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The laryngeal theory aims to produce greater regularity in the reconstruction of Proto-Indo-European phonology than in the reconstruction produced by the comparative method. Most notably, it seeks to extend the general occurrence of ablaut (apophony) to syllables that contain reconstructed vowel phonemes other than *e or *o.
In its earlier form (see below) the theory postulated three sounds in PIE (Proto-Indo-European) which combined with reconstructed *e or *o to produce vowel phonemes which would not otherwise be predicted by the rules of ablaut. It received considerable support from the decipherment of Hittite, which was discovered to be an Indo-European language. Many Hittite words were recognised as reflexes (derived words) of PIE, with a phoneme represented as ḫ corresponding to one of the hypothetical PIE sounds. Subsequent scholarship has established a set of rules by which an ever-increasing number of reflexes in daughter languages may be derived from PIE roots. The number of explanations achieved and the simplicity of the postulated system has led to widespread acceptance of the theory.
In its most widely accepted version, the theory posits three phonemes h₁, h₂ and h₃ (see below) in PIE. In Hittite, h₂ developed into ḫ. Other daughter languages inherited derived sounds resulting from merger with PIE short vowels, and subsequent loss. The phonemes are now recognised as consonants related to articulation in the general area of the larynx where a consonantal gesture may affect vowel quality. They are regularly known as laryngeal but the actual place of articulation for each consonant remains a matter of debate. (see below).
The evidence for their existence is mostly indirect, as will be shown below. But the theory serves as an elegant explanation for a number of properties of the Proto-Indo-European vowel system that, prior to the postulation of laryngeals, were indecipherable, such as "independent" schwas (as in *pəter- 'father'); and the hypothesis that PIE schwa *ə was actually a consonant, not a vowel, provides an elegant explanation for some apparent exceptions to Brugmann's law in Indic.
- 1 History
- 2 Varieties of laryngeals
- 3 Pronunciation
- 4 Support for theory from daughter languages
- 4.1 Direct reflexes of laryngeals
- 4.2 Proposed indirect reflexes
- 4.2.1 Vowel coloration and lengthening
- 4.2.2 Greek triple reflex vs schwa
- 4.2.3 Support from Greek ablaut
- 4.2.4 H-loss and other vowels
- 4.2.5 Intervocalic H-loss
- 4.2.6 H-loss adjacent to other sounds
- 5 Laryngeals in the Uralic languages
- 6 Explanation of ablaut and other vowel changes
- 7 Comments
- 8 Laryngeals in morphology
- 9 Criticism
- 10 References
- 11 Bibliography
- 12 External links
The beginnings of the theory were proposed by Ferdinand de Saussure in 1879, in an article chiefly devoted to something else altogether (demonstrating that *a and *o were separate phonemes in PIE). In the course of his analysis, Saussure proposed that what had then been reconstructed as long vowels *ā and *ō, alternating with *ǝ, was actually an ordinary type of PIE ablaut. That is, it was an alternation between e-grade and zero grade like in "regular" ablaut (further explanations below), but followed by a previously unidentified element. This "element" accounted for both the changed vowel color and the lengthening (short *e becoming long *ā or *ō). So, rather than reconstructing *ā, ō and *ǝ as others had done before, Saussure proposed something like *eA alternating with *A and *eO with *O, where A and O represented the unidentified elements. Saussure called them simply coefficients sonantiques, which was the term for what are now in English more usually called resonants; that is, the six elements present in PIE which can be either consonants (nonsyllabic) or vowels (syllabic) depending on the sounds they're adjacent to: *y w r l m n.
These views were accepted by a few scholars, in particular Hermann Möller, who added important elements to the theory. Saussure's observations, however, did not achieve any general currency, as they were still too abstract and had little direct evidence to back them up.
This changed when Hittite was discovered and deciphered in the early 20th century. Hittite had a sound or sounds written with symbols from the Akkadian syllabary conventionally transcribed as ḫ, as in te-iḫ-ḫi "I put, am putting". This consonant did not appear to be clearly related to any of the consonants then reconstructed for PIE, and various unsatisfactory proposals were made to explain this consonant in terms of the PIE consonant system as it had then been reconstructed. It remained for Jerzy Kuryłowicz (Études indoeuropéennes I, 1935) to propose that these sounds lined up with Saussure's conjectures. He suggested that the unknown consonant of Hittite was in fact a direct reflex of the coefficients sonantiques that Saussure had proposed.
Their appearance explained some other matters as well; they explained, for example, why verb roots containing only a consonant and a vowel always have long vowels. For example, in *dō- "give", the new consonants allowed linguists to decompose this further into *deh₃. This not only accounted for the patterns of alternation more economically than before (by requiring fewer types of ablaut), but also brought the structure of these roots into line with the basic PIE pattern which required roots to begin and end with a consonant.
The lateness of the discovery of these sounds by Indo-Europeanists is largely because Hittite and the other Anatolian languages are the only Indo-European languages where at least some of them are attested directly and consistently as consonantal sounds. Otherwise, their presence is to be inferred mostly through the effects they have on neighboring sounds, and on patterns of alternation that they participate in. When a laryngeal is attested directly, it is usually as a special type of vowel and not as a consonant.
Varieties of laryngeals
There are many variations of the laryngeal theory. Some scholars, such as Oswald Szemerényi, reconstruct just one laryngeal. Some follow Jaan Puhvel's reconstruction of eight or more (in his contribution to Evidence for Laryngeals, ed. Werner Winter). Most scholars work with a basic three:
- *h₁, the "neutral" laryngeal
- *h₂, the "a-coloring" laryngeal
- *h₃, the "o-coloring" laryngeal
Some scholars suggest the existence of a fourth consonant, *h₄, which differs from *h₂ in not being reflected as Anatolian ḫ  but being reflected, to the exclusion of all other laryngeals, as Albanian h when word-initial before an originally stressed vowel. E.g. PIE *h₄órǵʰiyeh₂ "testicle" yields Albanian herdhe "testicle" but Hittite arki- "testicle" whereas PIE *h₂ŕ̥tkos "bear" yields Alb. ari "bear" but Hittite hart(ag)ga- (=/hartka-/) "cultic official, bear-person". Another such theory, but much less generally accepted, is Winfred P. Lehmann's view, on the basis of inconsistent reflexes in Hittite, that *h₁ was actually two separate sounds. (He assumed that one was a glottal stop and the other a glottal fricative.)
Some direct evidence for laryngeal consonants comes from Anatolian: PIE *a is a fairly rare sound, and in an uncommonly large number of good etymologies it is word-initial. Thus PIE (traditional) *anti "in front of and facing" > Greek antí "against"; Latin ante "in front of, before"; Sanskrit ánti "near; in the presence of". But in Hittite there is a noun ḫants "front, face", with various derivatives (ḫantezzi "first", and so on), pointing to a PIE root-noun *h₂ent- "face" (of which *h₂enti would be the locative singular). (It does not necessarily follow that all reconstructed forms with initial *a should automatically be rewritten *h₂e.)
Similarly, the traditional PIE reconstruction for 'sheep' is *owi- (a y-stem, not an i-stem) whence Sanskrit ávi-, Latin ovis, Greek óïs. But Luwian has ḫawi-, indicating instead a reconstruction *h₃ewis.
Considerable debate still surrounds the pronunciation of the laryngeals and various arguments have been given to pinpoint their exact place of articulation. Firstly the effect these sounds have had on adjacent phonemes is well documented. The evidence from Hittite and Uralic is sufficient to conclude that these sounds were "guttural" or pronounced rather back in the buccal cavity. The same evidence is also consistent with the assumption that they were fricative sounds (as opposed to approximants or stops), an assumption which is strongly supported by the behaviour of laryngeals in consonant clusters.
The assumption that *h₁ is a glottal stop [ʔ] is still very widespread. However, as some evidence suggests, there were two *h₁ sounds: one being the glottal stop [ʔ] and the other the h sound [h] of English hat.
Jens Elmegård Rasmussen (1983) suggested a consonantal realization for *h₁ as the voiceless glottal fricative [h] with a syllabic allophone [ə] (mid central unrounded vowel). This is supported by the closeness of [ə] to [e] (with which it coalesces in Greek), its failure (unlike *h₂ and *h₃) to create an auxiliary vowel in Greek and Tocharian when it occurs between a semivowel and a consonant, and the typological likelihood of a [h] given the presence of aspirated consonants in PIE.
In 2004, Alwin Kloekhorst has argued that the Hieroglyphic Luwian sign no. 19 (conventionally transcribed á) stood for /ʔa/ (distinct from /a/, sign no. 450: a) and represents the reflex of */h₁/; this would support the hypothesis that */h₁/, or at least some cases of it, was [ʔ]. Later, Kloekhorst (2006) claimed that also Hittite preserves PIE *h₁ as a glottal stop [ʔ], visible in words like Hittite e-eš-zi 'he is' < PIE *h₁és-ti, where an extra initial vowel sign is used (so-called plene spelling). This hypothesis has met with serious criticism (e.g. Rieken (2010), Melchert (2010) and Weeden (2011). Recently, however, Simon (2010) has supported Kloekhorst's thesis by suggesting that plene spelling in Cuneiform Luwian can be explained in a similar way. Additionally, Simon's 2013 article revises the Hieroglyphic Luwian evidence and concludes that "although some details of Kloekhorst's arguments could not be maintained, his theory can be confirmed."
An occasionally advanced idea that the laryngeals were dorsal fricatives corresponding directly to the three traditionally reconstructed series of dorsal stops ("palatal", velar, and labiovelar) suggests a further possibility, a palatal fricative [ç].
From what is known of such phonetic conditioning in contemporary languages, notably Semitic languages, *h₂ (the "a-colouring" laryngeal) could have been a pharyngeal fricative such as [ħ] and [ʕ]. Pharyngeal consonants (like the Arabic letter ح (ħ) as in Muħammad) often cause a-coloring in the Semitic languages. Uvular fricatives, however, may also colour vowels, thus [χ] is also a noteworthy candidate.
Likewise it is generally assumed that *h₃ was rounded (labialized) due to its o-coloring effects. It is often taken to have been voiced based on the perfect form *pi-bh₃- from the root *peh₃ "drink" and possibly a few other examples.[which?] Based on the analogy of Arabic, some linguists[who?] have assumed that *h₃ was also pharyngeal like Arabic ع (ayin, i.e. [ʕ] as in Arabic muʕallim = "teacher") perhaps plus labialization [ʕʷ], although the assumption that it was velar [ɣʷ] is probably more common. (The reflexes in Uralic languages could be the same whether the original phonemes were velar or pharyngeal.)
However, since the defining effect of this phoneme is vowel-rounding rather than vowel-lowering, a pharyngeal value is unnecessary. Thus, a velar value of voiceless [xʷ] or voiced [ɣʷ] is also quite possible given the evidence. A voiced realisation also matches more neatly when seen in the context of Cowgill's law and Grimm's law in Germanic. Along this vein, Rasmussen has chosen a consonantal realization for *h₃ as a voiced labialized velar fricative [ɣʷ], with a syllabic allophone [ɵ], i.e. a close-mid central rounded vowel.
Possible other uvulars
Common assumptions or not, it is obvious that rounding alone (*w, *kʷ, *gʷ, *gʷʰ) did not color vowels in PIE; some additional (or alternative) feature like "lowered larynx" (as appropriate for "laryngeals" in the Semitic sense) might well have had the appropriate influence on the formants of adjacent vowels. It has been pointed out that PIE *a in verb roots, such as *kap- "take", has a number of peculiarities: it doesn't as a rule participate in ablaut, and it occurs with noticeable frequency in roots like *kap-, viz., with a "plain velar" stop. But there is a chicken-and-egg problem here: if there is in fact any significance to this co-occurrence, does the plain velar articulation account for the a-vocalism, or vice versa?
The same is shown by some IE-Semitic correspondences, whether these are due to prehistoric borrowing or to a common ancestor (see Nostratic theory):
- Greek ὀδύσσομαι (odýssomai) = "I hate", from IE root h₃-d-w :: Arabic ʕadūw = "enemy".
- dialectal (e.g. Ionic) Greek ἅϝησι (áwēsi) = "it (= a wind) blows", from IE root h₂-w-h₁ :: Arabic hawāʔ="air".
In any event, if PIE *h₂ is regarded as somehow in the same series as the plain velar stops as usually reconstructed, some may adduce that its existence is considerably better founded than the existence of the plain velar stops. However, we must also note that in the traditional account, there is an overabundance of marked velar stops (*ḱ, *ǵ, *ǵʰ) versus plain ones (*k, *g, *gʰ). This suggests that indeed what has been labeled "palatal" is rather "plain" while "plain" is something else, such as a uvular plosive. This then may add to the evidence in favor of *h₂ being uvular [χ], thus also solving the source of its vowel-colouring tendencies.
Support for theory from daughter languages
The hypothetical existence of laryngeals in PIE finds support in the body of daughter language cognates which can be most efficiently explained through simple rules of development.
Direct reflexes of laryngeals
|PIE root||Meaning||Anatolian reflex||Cognates|
|*peh₂-(s)-||'protect'||Hittite pahhs-||Sanskrit pā́ti, Latin pascere (pastus), Greek patéomai|
|*dʰuh₂-||'breath/smoke'||Hittite tuhhuis||Sanskrit dhūmá-, Latin fūmus, Greek thūmos|
|*h₂ent-||'front'||Hittite hant-||Sanskrit ánti, Latin ante, Greek anti|
|*h₂erǵ-||'white/silver'||Hittite harki-||Sanskrit árjuna, Latin argentum, Greek árguron, Tocharian A ārki|
|Sanskrit ávi-, Latin ovis, Greek ó(w)is|
Proposed indirect reflexes
In all other daughter languages, comparison of the cognates can support only hypothetical intermediary sounds derived from PIE combinations of vowels and laryngeals. Some indirect reflexes are required to support the examples above where the existence of laryngeals is uncontested.
PIE Intermediary Reflexes eh₂ ā ā, a, ahh uh₂ u ū, uhh h₂e a a, ā h₂o o o, a
The proposals in this table account only for attested forms in daughter languages. Extensive scholarship has produced a large body of cognates which may be identified as reflexes of a small set of hypothetical intermediary sound, including those in the table above. Individual sets of cognates are explicable by other hypotheses but the sheer bulk of data and the elegance of the laryngeal explanation has led to widespread acceptance in principle.
Vowel coloration and lengthening
In the proposed Anatolian-language reflexes above, only some of the vowel sounds reflect PIE *e. In the daughter languages in general, many vowel sounds are not obvious reflexes. The theory explains this as the result of
- 1 H-coloration. PIE *e is 'coloured' (i.e. its sound-value is changed) before or after h₂ and h₃, but not when next to h₁.
Laryngeal precedes Laryngeal follows h₁e > h₁e eh₁ > eh₁ h₂e > h₂a eh₂ > ah₂ h₃e > h₃o eh₃ > oh₃
- 2 H-loss. Any of the three laryngeals (symbolised here as H) is lost before a short vowel. Laryngeals are also lost before another consonant (symbolised here as C,) with consequent lengthening of the vowel.
Before vowel Before consonant He > e eHC > ēC Ha > a aHC > āC Ho > o oHC > ōC Hi > i iHC > īC Hu > u uHC > ūC
The results of H-coloration and H-loss are recognised in daughter-language reflexes such as those in the table below
After vowels PIE Latin Sanskrit Greek Hittite '*iH>ī *gʷih₂wós vīvos jīva bíos *uH>ū *dʰuh₂- fūmus dhūma thūmós *oH>ō *sóh₂wl̥ sōl sū́rya hḗlios *eh₁>ē *séh₁mn̥ sēmen hêma *eh₂>ā *peh₂-(s)- pāscere (pastus) pā́ti patéomai pahhs *eh₃> ō *deh₃r/n dōnum dāna dôron
Before vowels PIE Latin Sanskrit Greek Hittite *Hi>i *h₂iteros iterum ítara *Hu>u *pélh₁us plūs purú- polús *Ho>o *h₂owi- ovis ávi ó(w)is *h₁e>e *h₁ésti est ásti ésti *h₂e>a *h₂ent
*h₃e>o *h₃érbhis orbis
Greek triple reflex vs schwa
Between three phonological contexts, Greek reflexes display a regular vowel pattern that is absent from the supposed cognates in other daughter languages. Before the development of laryngeal theory, scholars compared Greek, Latin and Sanskrit (then considered earliest daughter languages) and concluded the existence in these contexts of a schwa (ə) vowel in PIE, the so-called schwa indogermanicum. The contexts are: 1. between consonants (short vowel); 2. word initial before a consonant (short vowel); 3. combined with a liquid or nasal consonant [r, i, m, n] (long vowel).
- 1 Between consonants
- Latin displays a and Sanskrit i, whereas Greek displays e, a or o
- 2 Word initial before a consonant
- Greek alone displays e, a or o
- 3 Combined with a liquid or nasal
- Latin displays a liquid/nasal consonant followed by ā; Sanskrit displays either īr/ūr or the vowel ā alone; Greek displays a liquid/nasal consonant followed by ē, ā (in dialects such as Doric) or ō
Laryngeal theory provides a more elegant general description than reconstructed schwa by assuming that the Greek vowels are derived though vowel colouring and H-loss from PIE h₁,h₂, h₃, constituting a so-called triple reflex.
*CHC *HC- *r̥H l̥H *m̥H *n̥H *h₁ Greek e e rē lē mē nē Latin a lost rā lā mā nā Sanskrit i lost īr/ūr īr/ūr ā ā *h₂ Greek a a rā lā mā nā Latin a lost rā lā mā nā Sanskrit i lost īr/ūr īr/ūr ā ā *h₃ Greek o o rō lō mō nō Latin a lost rā lā mā nā Sanskrit i lost īr/ūr īr/ūr ā ā
- 1 Between consonants
- An explanation is provided for the existence of three vowel reflexes in Greek corresponding to single reflexes in Latin and in Sanskrit
- 2 Word initial
- The assumption of *HC- in PIE yields an explanation for a dichotomy exhibited below between cognates in the Anatolian, Greek and Armenian languages reflexes with initial a and cognates in the remaining daughters which lack that syllable, The theory assumes initial *h₂e in the PIE root, which has been lost in most of the daughter languages.
- *h₂ster- 'star': Hittite hasterza, Greek astḗr, Armenian astí, Latin stella, Sanskrit tár-
- *h₂wes 'live, spend time': Hittite huis- 'live', Greek á(w)esa 'I spent a night', Sanskrit vásati 'spend the night', English was
- *h₂ner- 'man': Greek anḗr, Armenian ayr (from *anir), Oscan niir, Sanskrit nár 
- 3 Combined with a liquid or nasal
- These presumed sonorant reflexes are completely distinct from those deemed to have developed from single phonemes.
*r̥ *l̥ *m̥ *n̥ Greek ra, ar la, al a a Latin or ul em en Sanskrit r̥ r̥ a a
The phonology of the sonorant examples in the previous table can only be explained by the presence of an adjacent phonemes in PIE. Assuming the phonemes to be a following h₁, h₂ or h₃ allows the same rules of vowel coloration and H-loss to apply to both PIE *e and PIE sonorants.
Support from Greek ablaut
The hypothetical values for sounds with laryngeals after H-coloration and H- loss (such as seen above in the triple reflex) draw much of their support for the regularisation they allow in ablaut patterns, specifically the uncontested patterns found in Greek.
Ablaut in the root
In the following table, each row shows undisputed Greek cognates sharing the three ablaut grades of a root. The four sonorants and the two semi-vowel are represented as individual letters, other consonants as C and the vowel or its absence as (V).
e-grade o-grade zero-grade root meaning C(V)C πέτεσθαι
'fly' C(V)iC λείπειν
'leave' C(V)uC φεύγειν
'flee' C(V)r δέρκομαι
'see clearly' C(V)l πέλομαι
'become' C(V)m τέμω
'cut' C(V)n γένος
The reconstructed PIE e-grade and zero-grade of the above roots may be arranged as follows:
e-grade zero-grade C(V) *pet *pt C(V)iC *leikʷ *likʷ C(V)uC *bʰeug *bʰug C(V)r *derk *drk C(V)l *kʷel *kʷl C(V)m *tem *tm C(V) *gen *gn
An extension of the table to PIE roots ending in presumed laryngeals allows many Greek cognates to follow a regular ablaut pattern.
C(V)h₁ *dʰeh₁ *dʰh₁ 'put' I : ē : τίθημι (títhēmi)
II : e : θετός (thetós)
C(V)h₂ *steh₂ *sth₂ 'stand' I : ā : ἳστᾱμι (hístāmi) Doric
II : a : στατός (statós)
C(V)h₃ *deh₃ *dh₃ 'give' I : ō : δίδωμι (dídōmi)
II : o : δοτός (dotós)
Ablaut in the suffix
The first row of the following table shows how uncontested cognates relate to reconstructed PIE stems with e-grade or zero-grade roots, followed by e-grade or zero-grade of the suffix –w-. The remaining rows show how the ablaut pattern of other cognates is preserved if the stems are presumed to include the suffixes h₁, h₂, h₃.
root meaning cognates *gen+w- *gn+ew- *gn+w- 'knee' I Hittite genu
II Gothic kniu
III γνύξ (gnuks)
*gen+h₁- *gn+eh₁ *gn+h₁- 'become' I γενετήρ (genetḗr)
II γνήσιος (gnḗsis)
III γίγνομαι (gígnomai)
*tel+h₂- *tl+eh₂- *tl+h₂- 'lift, bear' I τελαμών (telamṓn)
II ἔτλᾱν (étlān)
III τάλας (tálas)
*ter+h₃- *tr+eh₃- *tr+h₃- 'bore, wound' II τιτρώσκω (titrṓskō)
III ἔτορον (étoron)
H-loss and other vowels
Scholars have proposed other sets of cognates which might be explained as the product of H-loss before or after PIE long vowels *ē and *ō and a proposed PIE short vowel *a. These have not been generally accepted. A particular proposed instance, *ēh₂ > *ē has sufficient support to acquire the name Eichner's law.
In the preceding sections, forms in the daughter languages were explained as reflexes of laryngeals in PIE stems. Since these stems are judged to have contained only one vowel, the explanations involved H-loss either when a vowel preceded or when a vowel followed. However, the possibility of H-loss between two vowels is present when a stem combines with an inflexional suffix.
It has been proposed that PIE H-loss resulted in hiatus, which in turn was contracted to a vowel sound distinct from other long vowels by being disyllabic or of extra length.
Early Indo-Iranian dissyllables
A number of long vowels in Avestan were pronounced as two syllables, and some examples also exist in early Sanskrit, particularly in the Rig Veda. These can be explained as reflexes of contraction following a hiatus caused by the loss of intervocalic H in PIE.
Proto-Germanic trimoric o
The reconstructed phonology of Proto-Germanic (P-Gmc), the presumed ancestor of the Germanic languages, includes a long *ō phoneme, which is in turn the reflex of PIE ā. As outlined above Laryngeal theory has identified instances of PIE ā as reflexes of earlier *h₂e, *eh₂ or *aH before a consonant.
However, a distinct long P-Gmc *ō phoneme has been recognised with a different set of reflexes in daughter Germanic languages. The vowel length has been calculated by observing the effect of the shortening of final vowels in Gothic.
length P-Gmc Gothic one mora *a, *i, *u zero, zero, u two morae *ē, *ī, *ō, *ū a, i?, a, u? three morae *ê, *ô ē, ō
Reflexes of trimoric or overlong *ô are found in the final syllable of nouns or verbs, and are thus associated with inflectional endings. Thus four P-Gmc sounds are proposed, shown here with Gothic and Old English reflexes:
P-Gmc Reflexes P-Gmc Reflexes bimoric oral *ō Goth –a
trimoric oral *ô Goth –ō
nasal *ō̜ Goth –a
nasal *ǫ̂ Goth –ō
A somewhat different contrast is observed in endings with final *z:
P-Gmc Reflexes P-Gmc Reflexes bimoric *ōz Goth –ōs
trimoric *ôz Goth –ōs
Laryngeal theory preserves regularities in declensions and conjugations by explaining the trimoric sound as a reflex of H-loss between vowels followed by contraction. Thus
By H-loss *oHo > *oo > *ô.
By H-coloration and H-loss *eh₂e > *ae > *â > *ô
Trimoric ending PIE Reflex P-Gmc Reflexes all stems
*-oHom Sanskrit -ām
[often disyllabic in Rig Veda]
Greek -ῶν (ô̜:n)
*-ô Gothic -ō
Old English -a
*-eh₂es Sanskrit –ās
*-ôz Gothic -ōs
Old English -a
Bimoric ending PIE Reflex P-Gmc Reflexes thematic verbs
1st person singular
*-oh₂ Latin -ō
*-ō Gothic -a
Old English -u
*-eh₂ Sanskrit -ā
*-ō Gothic -a
Old English -u
*-eh₂m Sanskrit -ām
*-ō̜ Gothic -a
Old English -e
*-eh₂ns Sanskrit -ās
*-ōz Gothic -ōs
Old English -e
(Trimoric *ô is also reconstructed as word-final in contexts that are not explained by laryngeal theory.)
Balto-Slavic long vowel accent
The reconstructed phonology of the Balto-Slavic languages posits two distinct long vowels in almost exact correspondence to bimoric and trimoric vowels in Proto-Germanic. The Balto-Slavic vowels are distinguished not by length but by intonation; long vowels with circumflex accent correspond to P-Gmc trimoric vowels. A significant proportion of long vowels with acute accent (also described as with acute register) correspond to P-Gmc bimoric vowels. These correspondences have led to the suggestion that the split between them occurred in the last common ancestor of the two daughters.
It has been suggested that acute intonation was associated with glottalisation, a suggestion supported by glottalised reflexes in Latvian. This could lend support to a theory that laryngeal consonants developed into glottal stops before their disappearance in Balto-Slavic and Proto-Germanic.
H-loss adjacent to other sounds
After stop consonants
PIE resonants (sonorants) *r̥,*l̥,*m̥,*n̥ are predicted to become consonantal allophones *r, *l*, *m, *n* when immediately followed by a vowel. Using R to symbolise any resonant (sonorant)and V for any vowel, *R̥V>*RV. Instances in the daughter languages of a vocalic resonant immediately followed by a vowel (RV) are explained as reflexes of PIE *R̥HV with a laryngeal between the resonant and the vowel giving rise to a vocalic allophone. This original vocalic quality was preserved following H-loss.
Reconstructed instances of *kw in Proto-Germanic have been explained as reflexes of PIE *h₃w (and possibly *h₂w), a process known as Cowgill's law. The proposal has been challenged but is defended by Don Ringe.
Examples PIE Total H-loss * H > *k Reflexes *n̥h₃we ( 'us two') Sanskrit āvā́m
Greek *nōwe > νώ (nó̜)
P-Gmc *unk(iz) (< *unkw) Gothic ugkis
Old English unc
*gʷih₃wós ('alive') Sanskrit jīvás
P-Gmc *kʷikʷaz Old Norse kvíkr
Old English cwic
Next to semi-vowels
(see Holtzmann's law)
Laryngeal theory has been used to explain the occurrence of a reconstructed sound change known as Holtzmann's law or sharpening (German Verschärfung ) in North Germanic and East Germanic languages. Existing theory explains that PIE semivowels *y and *w were doubled to P-Gmc *-yy- and *-ww-, and that these in turn became -ddj-and -ggw-respectively in Gothic and -ggj- and -ggw- in early North Germanic languages. However, existing theory had difficulty in predicting which instances of PIE semivowels lead to sharpening and which instances failed to do so. The new explanation proposes that words exhibiting sharpening are derived from PIE words with laryngeals.
PIE early P-Gmc later P-Gmc Reflexes *drewh₂yo 'trustworthy' *trewwjaz with sharpening *triwwjaz Gothic triggws
Old Norse tryggr
without sharpening *triuwjaz Old English trēowe
Old High German gitriuwi
Many of these techniques rely on the laryngeal being preceded by a vowel, and so they are not readily applicable for word-initial laryngeals except in Greek and Armenian. However, occasionally languages have compounds in which a medial vowel is unexpectedly lengthened or otherwise shows the effect of a following laryngeal. This shows that the second word originally began with a laryngeal, and that this laryngeal still existed at the time the compound was formed.
Laryngeals in the Uralic languages
Further evidence of the laryngeals has been found in Uralic languages. While Proto-Uralic and PIE have not been demonstrated to be genetically related, some word correspondences between Uralic and Indo-European have been identified as likely borrowings from very early Indo-European dialects to early Uralic dialects. One example is the widespread word family including on the Uralic side e.g. Hungarian méz, Finnish and Estonian mesi, met(e)-, Mari мӱ /my/, Komi ма /ma/ 'honey', suggesting Proto-Uralic *meti; and on the Indo-European side, English mead, Greek methu 'wine', German Met 'honey wine', Slavic medъ and Sanskrit mádhu 'honey' etc.
There are several criteria to date such borrowings, the most reliable ones coming from historical phonology. For example, Finnic porsas, Erzya пурцос /purt͡sos/, Mokša пурьхц /pur̥ʲt͡s/ 'piglet' presuppose a common proto-form *porćas at an earlier stage of development. This is etymologized as a loanword from PIE *porḱ-, which gives Latin porcus 'hog', Slavic porsę 'pig', OE fearh (> Engl. farrow 'young pig'), Lithuanian par̃šas 'piglet, castrated boar'. Here loaning must have occurred predating the depalatalisation of centum languages, and the later development into the Baltic *š reflected as Finn. h in borrowings, or Iranian *c medially reflected as Finn. t. If the PIE distinction between palatovelars and plain velars is reconstructed as one of velars and uvulars, then instead of the former condition also a lower limit can be set up for the loan, as postdating the satemization of *ḱ into a palatalized stop or affricate.
Work particularly associated with research of the scholar Jorma Koivulehto has identified a number of additions to the list of Finnic loanwords from an Indo-European source or sources whose particular interest is the apparent correlation of PIE laryngeals with three post-alveolar phonemes (or their later reflexes) in the Finnic forms. If so, this would point to a great antiquity for the borrowings, since no attested Indo-European language neighbouring Uralic has consonants as reflexes of laryngeals. And it would bolster the idea that laryngeals were phonetically distinctly consonantal.
Three Uralic phonemes have been posited to reflect PIE laryngeals. In post-vocalic positions both the post-alveolar fricatives that ever existed in Uralic are represented: firstly a possibly velar one, theoretically reconstructed much as the PIE laryngeals (conventionally marked *x), in the very oldest borrowings and secondly a grooved one (*š as in shoe becoming modern Finnic h) in some younger ones. The velar plosive k is the third reflex and the only one found word-initially. In intervocalic position the reflex k is probably younger than either of the two former ones. The fact that Finno-Ugric may have plosive reflexes for PIE laryngeals is to be expected under well documented Finnic phonological behaviour and does not mean much for tracing the phonetic value of PIE laryngeals (cf. Finnish kansa 'people' < PGmc *xansā 'company, troupe, party, crowd' (cf. German Hanse), Finnish kärsiä 'suffer, endure' < PGmc *xarđia- 'endure' (cf. E. hard), Finnish pyrkiä < PGmc. *wurk(i)ja- 'work, work for' etc.).
The correspondences do not differentiate between h₁, h₂ and h₃. Thus
- PIE laryngeals correspond to the PU laryngeal *x in wordstems like:
- Finnish na-inen 'woman' / naa-ras 'female' < PU *näxi-/*naxi- < PIE *[gʷnah₂-] = */gʷneh₂-/ > Sanskrit gnā́ 'goddess', OIr. mná (gen. of ben), ~ Greek gunē 'woman' (cognate to Engl. queen)
- Finnish sou-ta- ~ Samic *sukë- 'to row' < PU *suxi- < PIE *sewh-
- Finnish tuo- 'bring' ~ Samic *tuokë- ~ Samoyed tāś 'give' < PU *toxi- < PIE *[doh₃-] = */deh₃-/ > Greek didōmi, Lat. dō-, Old Lith. dúomi 'give', Hittite dā 'take'
- Note the consonantal reflex /k/ in Samic.
- PIE laryngeals correspond to Finnic *h, whose normal origin is a Pre-Finnic fricative *š in wordstems like:
- Finnish rohto 'medical plant, green herb' < PreFi *rošto < PreG *groH-tu- > Gmc. *grōþu 'green growth' > Swedish grodd 'germ (shoot)'
- Old Finnish inhi-(m-inen) 'human being' < PreFi *inši- 'descendant' < PIE *ǵnh₁-(i)e/o- > Sanskrit jā́- 'born, offspring, descendant', Gmc. *kunja- 'generation, lineage, kin'
- PIE laryngeals correspond to Pre-Finnic *k in wordstems like:
- Finnish kesä 'summer' < PFS *kesä < PIE *h₁es-en- (*h₁os-en-/-er-) > Balto-Slavic *eseni- 'autumn', Gothic asans 'summer'
- Finnish kaski 'burnt-over clearing' < Proto-Finnic *kaski < PIE/PreG *[h₂a(h₁)zg-] = */h₂e(h₁)sg-/ > Gmc. *askōn 'ashes'
- Finnish koke- 'to perceive, sense' < PreFi *koki- < PIE *[h₃okw-ie/o] = */h₃ekw-ie/o/ > Greek opsomai 'look, observe' (cognate to Lat. oculus 'eye')
- Finnish kulke- 'to go, walk, wander' ~ Hungarian halad- 'to go, walk, proceed' < PFU *kulki- < PIE *kʷelH-e/o- > Greek pelomai '(originally) to be moving', Sanskrit cárati 'goes, walks, wanders (about)', cognate Lat. colere 'to till, cultivate, inhabit'
- Finnish teke- 'do, make' ~ Hungarian tëv-, të-, tesz- 'to do, make, put, place' < PFU *teki- < PIE *dʰeh₁ > Greek títhēmi, Sanskrit dádhāti 'put, place', but 'do, make' in the western IE languages, e.g. the Germanic forms do, German tun, etc., and Latin faciō (though OE dón and into Early Modern English still sometimes means "put", and still does in Dutch and colloquial German).
This list is not exhaustive, especially when one also considers a number of etymologies with laryngeal reflexes in Finno-Ugric languages other than Finnish. For most cases no other plausible etymology exists. While some single etymologies may be challenged, the case for this oldest stratum itself seems conclusive from the Uralic point of view, and corresponds well with all that is known about the dating of the other most ancient borrowings and about contacts with Indo-European populations. Yet acceptance for this evidence is far from unanimous among Indo-European linguists, some even regard the hypothesis controversial.
Explanation of ablaut and other vowel changes
|This section is outdated. (November 2013)|
A feature of Proto-Indo-European morpheme structure was a system of vowel alternations termed ablaut ("alternate sound") by early German scholars and still generally known by that term (except in French, where the term apophonie is preferred). Several different such patterns have been discerned, but the commonest one, by a wide margin, is e/o/zero alternation found in a majority of roots, in many verb and noun stems, and even in some affixes (the genitive singular ending, for example, is attested as *-es, *-os, and *-s). The different states are called ablaut grades; e-grade and o-grade are together "full grades", and the total absence of any vowel is "zero grade".
Thus the root *sed- "to sit (down)" (roots are traditionally cited in the e-grade, if they have one) has three different shapes: *sed-, *sod-, and *sd-. This kind of patterning is found throughout the PIE root inventory and is transparent:
- "sed"-: (vedic), **sed-: in Latin sedeō "am sitting", Old English sittan "to sit" < *set-ja- (with umlaut) < *sed-; Greek hédrā "seat, chair" < *sed- (Greek systemically turns word-initial prevocalic s to h, i.e. rough breathing).
- *sod-: in Latin solium "throne" (in Latin l sporadically replaces d between vowels, said by Roman grammarians to be a Sabine trait) = Old Irish suideⁿ /suðʲe/ "a sitting" (all details regular from PIE *sod-yo-m); Gothic satjan = Old English settan "to set" (causative) < *sat-ja- (umlaut again) < PIE *sod-eye-. PIE *se-sod-e "sat" (perfect) > Sanskrit sa-sād-a per Brugmann's law.
- *sd-: in compounds, as *ni- "down" + *sd- = *nisdos "nest": English nest < Proto-Germanic *nistaz, Latin nīdus < *nizdos (all regular developments); Slavic gnězdo < *g-ně-sd-os. The 3pl (third person plural) of the perfect would have been *se-sd-ṛ whence Indo-Iranian *sazdṛ, which gives (by regular developments) Sanskrit sedur /sēdur/.
Roots *dō and *stā
In addition to the commonplace roots of consonant + vowel + consonant structure, there are also well-attested roots like *dhē- "put, place" and *dō- "give" (mentioned above): these end in a vowel, which is always long in the categories where roots like *sed- have full grades; and in those forms where zero grade would be expected, if before an affix beginning with a consonant, we find a short vowel, reconstructed as *ə, or schwa (more formally, schwa primum indogermanicum). An "independent schwa", like the one in PIE *pǝter- "father", can be identified by the distinctive cross-language correspondences of this vowel that are different from the other five short vowels. (Before an affix beginning with a vowel, there is no trace of a vowel in the root, as shown below.)
Whatever caused a short vowel to disappear entirely in roots like *sed-/*sod-/*sd-, it was a reasonable inference that a long vowel under the same conditions would not quite disappear, but would leave a sort of residue. This residue is reflected as i in Indic while dropping in Iranian; it gives variously e, a, o in Greek; it mostly falls together with the reflexes of PIE *a in the other languages (always bearing in mind that short vowels in non-initial syllables undergo various developments in Italic, Celtic, and Germanic):
- *dō- "give": in Latin dōnum "gift" = Old Irish dán /daːn/ and Sanskrit dâna- (â = ā with tonic accent); Greek dí-dō-mi (reduplicated present) "I give" = Sanskrit dádāmi; Slavic damъ 'I give'. But in the participles, Greek dotós "given" = Sanskrit ditá-, Latin datus all < *də-tó-.
- *stā- "stand": in Greek hístēmi (reduplicated present, regular from *si-stā-), Sanskrit a-sthā-t aorist "stood", Latin testāmentum "testimony" < *ter-stā- < *tri-stā- ("third party" or the like), Slavic sta-ti 'to stand'. But Sanskrit sthitá-"stood", Greek stásis "a standing", Latin supine infinitive statum "to stand".
Conventional wisdom lined up roots of the *sed- and *dō- types as follows:
|Full Grades||Weak Grades||Meaning|
But there are other patterns of "normal" roots, such as those ending with one of the six resonants (*y w r l m n), a class of sounds whose peculiarity in Proto-Indo-European is that they are both syllabic (vowels, in effect) and consonants, depending on what sounds are adjacent:
Root *bher-/bhor-/bhṛ- ~ bhr
- *bher-: in Latin ferō = Greek phérō, Avestan barā, Sanskrit bharāmi, Old Irish biur, Old Norse ber, Old English bere all "I carry"; Slavic berǫ 'I take'; Latin ferculum "bier, litter" < *bher-tlo- "implement for carrying".
- *bhor-: in Gothic and Scandinavian barn "child" (= English dial. bairn), Greek phoréō "I wear [clothes]" (frequentative formation, *"carry around"); Sanskrit bhâra- "burden" (*bhor-o- via Brugmann's law); Slavic vyborъ 'choice'.
- *bhṛ- before consonants: Sanskrit bhṛ-tí- "a carrying"; Gothic gabaurþs /gaˈbɔrθs/, Old English ġebyrd /jəˈbyɹd/, Old High German geburt all "birth" < *gaburdi- < *bhṛ-tí; Slavic bьrati 'to take'.
- *bhr- before vowels: Ved bibhrati 3pl. "they carry" < *bhi-bhr-ṇti; Greek di-phrós "chariot footboard big enough for two men" < *dwi-bhr-o-.
Saussure's insight was to align the long-vowel roots like *dō-, *stā- with roots like *bher-, rather than with roots of the *sed- sort. That is, treating "schwa" not as a residue of a long vowel but, like the *r of *bher-/*bhor-/*bhṛ-, an element that was present in the root in all grades, but which in full grade forms coalesced with an ordinary e/o root vowel to make a long vowel, with "coloring" (changed phonetics) of the e-grade into the bargain; the mystery element was seen by itself only in zero grade forms:
|Full Grades||Zero Grade||Meaning|
|bher-, bhor-||bhṛ- / bhr-||"carry"|
|deX, doX-||dẊ- / dX-||"give"|
(Ẋ = syllabic form of the mystery element)
Saussure treated only two of these elements, corresponding to our *h₂ and *h₃. Later it was noticed that the explanatory power of the theory, as well as its elegance, were enhanced if a third element were added, our *h₁, which has the same lengthening and syllabifying properties as the other two but has no effect on the color of adjacent vowels. Saussure offered no suggestion as to the phonetics of these elements; his term for them, "coefficients sonantiques", was not however a fudge, but merely the term in general use for glides, nasals, and liquids (i.e., the PIE resonants) as in roots like *bher-.
As mentioned above, in forms like *dwi-bhr-o- (etymon of Greek diphrós, above), the new "coefficients sonantiques" (unlike the six resonants) have no reflexes at all in any daughter language. Thus the compound *mṇs-dheH- "to 'fix thought', be devout, become rapt" forms a noun *mṇs-dhH-o- seen in Proto-Indo-Iranian *mazdha- whence Sanskrit medhá- /mēdha/ "sacrificial rite, holiness" (regular development as in sedur < *sazdur, above), Avestan mazda- "name (originally an epithet) of the greatest deity".
There is another kind of unproblematic root, in which obstruents flank a resonant. In the zero grade, unlike the case with roots of the *bher- type, the resonant is therefore always syllabic (being always between two consonants). An example would be *bhendh- "tie, bind":
- *bhendh-: in Germanic forms like Old English bindan "to tie, bind", Gothic bindan; Lithuanian beñdras "chum", Greek peĩsma "rope, cable" /pêːsma/ < *phenth-sma < *bhendh-smṇ.
- *bhondh-: in Sanskrit bandhá- "bond, fastening" (*bhondh-o-; Grassmann's law) = Old Icelandic bant, OE bænd; Old English bænd, Gothic band "he tied" < *(bhe)bhondh-e.
- *bhṇdh-: in Sanskrit baddhá- < *bhṇdh-tó- (Bartholomae's law), Old English gebunden, Gothic bundan; German Bund "league". (English bind and bound show the effects of secondary (Middle English) vowel lengthening; the original length is preserved in bundle.)
This is all straightforward and such roots fit directly into the overall patterns. Less so are certain roots that seem sometimes to go like the *bher- type, and sometimes to be unlike anything else, with (for example) long syllabics in the zero grades while at times pointing to a two-vowel root structure. These roots are variously called "heavy bases", "dis(s)yllabic roots", and "seṭ roots" (the last being a term from Pāṇini's grammar. It will be explained below).
Root *ǵen, *ǵon, *ǵṇn-/*ǵṇ̄
For example, the root "be born, arise" is given in the usual etymological dictionaries as follows:
- (A) *ǵen-, *ǵon-, *ǵṇn-
- (B) *ǵenə-, *ǵonə-, *ǵṇ̄-
The (A) forms occur when the root is followed by an affix beginning with a vowel; the (B) forms when the affix begins with a consonant. As mentioned, the full-grade (A) forms look just like the *bher- type, but the zero grades always and only have reflexes of syllabic resonants, just like the *bhendh- type; and unlike any other type, there is a second root vowel (always and only *ə) following the second consonant:
- (A) PIE *ǵenos- neut s-stem "race, clan" > Greek (Homeric) génos, -eos, Sanskrit jánas-, Avestan zanō, Latin genus, -eris.
- (B) Greek gené-tēs "begetter, father"; géne-sis < *ǵenə-ti- "origin"; Sanskrit jáni-man- "birth, lineage", jáni-tar- "progenitor, father", Latin genitus "begotten" < genatos.
- (A) Sanskrit janayati "beget" = Old English cennan /kennan/ < *ǵon-eye- (causative); Sanskrit jána- "race" (o-grade o-stem) = Greek gónos, -ou "offspring".
- (B) Sanskrit jajāna 3sg. "was born" < *ǵe-ǵon-e.
- (A) Gothic kuni "clan, family" = OE cynn /künn/, English kin; Rigvedic jajanúr 3pl.perfect < *ǵe-ǵṇn- (a relic; the regular Sanskrit form in paradigms like this is jajñur, a remodeling).
- (B) Sanskrit jātá- "born" = Latin nātus (Old Latin gnātus, and cf. forms like cognātus "related by birth", Greek kasí-gnētos "brother"); Greek gnḗsios "belonging to the race". (The ē in these Greek forms can be shown to be original, not Attic-Ionic developments from Proto-Greek *ā.)
On the term "seṭ". The Pāṇinian term "seṭ" (that is, sa-i-ṭ) is literally "with an /i/". This refers to the fact that roots so designated, like jan- "be born", have an /i/ between the root and the suffix, as we've seen in Sanskrit jánitar-, jániman-, janitva (a gerund). Cf. such formations built to "aniṭ" ("without an /i/") roots, such as han- "slay": hántar- "slayer", hanman- "a slaying", hantva (gerund). In Pāṇini's analysis, this /i/ is a linking vowel, not properly a part of either the root or the suffix. It is simply that some roots are in effect in the list consisting of the roots that (as we would put it) "take an -i-".
But historians have the advantage here: the peculiarities of alternation, the "presence of /i/", and the fact that the only vowel allowed in second place in a root happens to be *ə, are all neatly explained once *ǵenə- and the like were understood to be properly *ǵenH-. That is, the patterns of alternation, from the point of view of Indo-European, were simply those of *bhendh-, with the additional detail that *H, unlike obstruents (stops and *s) would become a syllable between two consonants, hence the *ǵenə- shape in the Type (B) formations, above.
The startling reflexes of these roots in zero grade before a consonant (in this case, Sanskrit ā, Greek nē, Latin nā, Lithuanian ìn) is explained by the lengthening of the (originally perfectly ordinary) syllabic resonant before the lost laryngeal, while the same laryngeal protects the syllabic status of the preceding resonant even before an affix beginning with a vowel: the archaic Vedic form jajanur cited above is structurally quite the same (*ǵe-ǵṇh₁-ṛ) as a form like *da-dṛś-ur "they saw" < *de-dṛḱ-ṛ.
Incidentally, redesigning the root as *ǵenH- has another consequence. Several of the Sanskrit forms cited above come from what look like o-grade root vowels in open syllables, but fail to lengthen to -ā- per Brugmann's law. All becomes clear when it is understood that in such forms as *ǵonH- before a vowel, the *o is not in fact in an open syllable. And in turn that means that a form like jajāna "was born", which apparently does show the action of Brugmann's law, is actually a false witness: in the Sanskrit perfect tense, the whole class of seṭ roots, en masse, acquired the shape of the aniṭ 3sing. forms. (See Brugmann's law for further discussion.)
There are also roots ending in a stop followed by a laryngeal, as *pleth₂-/*pḷth₂- "spread, flatten", from which Sanskrit pṛthú- "broad" masc. (= Avestan pərəθu-), pṛthivī- fem., Greek platús (zero grade); Skt. prathimán- "wideness" (full grade), Greek platamṓn "flat stone". The laryngeal explains (a) the change of *t to *th in Proto-Indo-Iranian, (b) the correspondence between Greek -a-, Sanskrit -i- and no vowel in Avestan (Avestan pərəθwī "broad" fem. in two syllables vs Sanskrit pṛthivī- in three).
- Caution has to be used in interpreting data from Indic in particular. Sanskrit remained in use as a poetic, scientific, and classical language for many centuries, and the multitude of inherited patterns of alternation of obscure motivation (such as the division into seṭ and aniṭ roots) provided models for coining new forms on the "wrong" patterns. There are many forms like tṛṣita- "thirsty" and tániman- "slenderness", that is, seṭ formations to unequivocally aniṭ roots; and conversely aniṭ forms like píparti "fills", pṛta- "filled", to securely seṭ roots (cf. the "real" past participle, pūrṇá-). Sanskrit preserves the effects of laryngeal phonology with wonderful clarity, but looks upon the historical linguist with a threatening eye: for even in Vedic Sanskrit, the evidence has to be weighed carefully with due concern for the antiquity of the forms and the overall texture of the data. (It is no help that Proto-Indo-European itself had roots which varied somewhat in their makeup, as *ǵhew- and *ǵhewd-, both "pour"; and some of these "root extensions" as they're called, for want of any more analytical term, are, unluckily, laryngeals.)
Stray laryngeals can be found in isolated or seemingly isolated forms; here the three-way Greek reflexes of syllabic *h₁, *h₂, *h₃ are particularly helpful, as seen below. (Comments on the forms follow.)
- *h₁ in Greek ánemos "wind" (cf. Latin animus "breath, spirit; mind", Vedic aniti "breathes") < *anə- "breathe; blow" (now *h₂enh₁-). Perhaps also Greek híeros "mighty, super-human; divine; holy", cf. Sanskrit iṣirá- "vigorous, energetic".
- *h₂ in Greek patḗr "father" = Sanskrit pitár-, Old English fæder, Gothic fadar, Latin pater. Also *meǵh₂ "big" neut. > Greek méga, Sanskrit máha.
- *h₃ in Greek árotron "plow" = Welsh aradr, Old Norse arðr, Lithuanian árklas.
The Greek forms ánemos and árotron are particularly valuable because the verb roots in question are extinct in Greek as verbs. This means that there is no possibility of some sort of analogical interference, as for example happened in the case of Latin arātrum "plow", whose shape has been distorted by the verb arāre "to plow" (the exact cognate to the Greek form would have been *aretrum). It used to be standard to explain the root vowels of Greek thetós, statós, dotós "put, stood, given" as analogical. Most scholars nowadays probably take them as original, but in the case of "wind" and "plow", the argument can't even come up.
Regarding Greek híeros, the pseudo-participle affix *-ro- is added directly to the verb root, so *ish₁-ro- > *isero- > *ihero- > híeros (with regular throwback of the aspiration to the beginning of the word), and Sanskrit iṣirá-. There seems to be no question of the existence of a root *eysH- "vigorously move/cause to move". If the thing began with a laryngeal, and most scholars would agree that it did, it would have to be *h₁-, specifically; and that's a problem. A root of the shape *h₁eysh₁- is not possible. Indo-European had no roots of the type *mem-, *tet-, *dhredh-, i.e., with two copies of the same consonant. But Greek attests an earlier (and rather more widely attested) form of the same meaning, híaros. If we reconstruct *h₁eysh₂-, all of our problems are solved in one stroke. The explanation for the híeros/híaros business has long been discussed, without much result; laryngeal theory now provides the opportunity for an explanation which did not exist before, namely metathesis of the two laryngeals. It is still only a guess, but it is a much simpler and more elegant guess than the guesses available before.
The syllabic *h₂ in *ph₂ter- "father" might not really be isolated. Certain evidence shows that the kinship affix seen in "mother, father" etc. might actually have been *-h₂ter- instead of *-ter-. The laryngeal syllabified after a consonant (thus Greek patḗr, Latin pater, Sanskrit pitár-; Greek thugátēr, Sanskrit duhitár- "daughter") but lengthened a preceding vowel (thus say Latin māter "mother", frāter "brother") — even when the "vowel" in question was a syllabic resonant, as in Sanskrit yātaras "husbands' wives" < *yṆt- < *yṇ-h₂ter-).
Laryngeals in morphology
Like any other consonant, Laryngeals feature in the endings of verbs and nouns and in derivational morphology, the only difference being the greater difficulty of telling what's going on. Indo-Iranian, for example, can retain forms that pretty clearly reflect a laryngeal, but there is no way of knowing which one.
The following is a rundown of laryngeals in Proto-Indo-European morphology.
- *h₁ is seen in the instrumental ending (probably originally indifferent to number, like English expressions of the type by hand and on foot). In Sanskrit, feminine i- and u-stems have instrumentals in -ī, -ū, respectively. In the Rigveda, there are a few old a-stems (PIE o-stems) with an instrumental in -ā; but even in that oldest text the usual ending is -enā, from the n-stems.
- Greek has some adverbs in -ē, but more important are the Mycenaean forms like e-re-pa-te "with ivory" (i.e. elephantē? -ě?)
- The marker of the neuter dual was *-iH, as in Sanskrit bharatī "two carrying ones (neut.)", nāmanī "two names", yuge "two yokes" (< yuga-i? *yuga-ī?). Greek to the rescue: the Homeric form ósse "the (two) eyes" is manifestly from *h₃ekʷ-ih₁ (formerly *okʷ-ī) via fully regular sound laws (intermediately *okʷye).
- *-eh₁- derives stative verb senses from eventive roots: PIE *sed- "sit (down)": *sed-eh₁- "be in a sitting position" (> Proto-Italic *sed-ē-ye-mos "we are sitting" > Latin sedēmus). It is clearly attested in Celtic, Italic, Germanic (the Class IV weak verbs), and Baltic/Slavic, with some traces in Indo-Iranian (In Avestan the affix seems to form past-habitual stems).
- It seems likely, though it is less certain, that this same *-h₁ underlies the nominative-accusative dual in o-stems: Sanskrit vṛkā, Greek lúkō "two wolves". (The alternative ending -āu in Sanskrit cuts a small figure in the Rigveda, but eventually becomes the standard form of the o-stem dual.)
- *-h₁s- derives desiderative stems as in Sanskrit jighāṃsati "desires to slay" < *gʷhi-gʷhṇ-h₁s-e-ti- (root *gʷhen-, Sanskrit han- "slay"). This is the source of Greek future tense formations and (with the addition of a thematic suffix *-ye/o-) the Indo-Iranian one as well: bhariṣyati "will carry" < *bher-h₁s-ye-ti.
- *-yeh₁-/*-ih₁- is the optative suffix for root verb inflections, e.g. Latin (old) siet "may he be", sīmus "may we be", Sanskrit syāt "may he be", and so on.
- *h₂ is seen as the marker of the neuter plural: *-h₂ in the consonant stems, *-eh₂ in the vowel stems. Much leveling and remodeling is seen in the daughter languages that preserve any ending at all, thus Latin has generalized *-ā throughout the noun system (later regularly shortened to -a), Greek generalized -ǎ < *-h₂.
- The categories "masculine/feminine" plainly did not exist in the most original form of Proto-Indo-European, and there are very few noun types which are formally different in the two genders. The formal differences are mostly to be seen in adjectives (and not all of them) and pronouns. Interestingly, both types of derived feminine stems feature *h₂: a type that is patently derived from the o-stem nominals; and an ablauting type showing alternations between *-yeh₂- and *-ih₂-. Both are peculiar in having no actual marker for the nominative singular, and at least as far as the *-eh₂- type, two things seem clear: it is based on the o-stems, and the nom.sg. is probably in origin a neuter plural. (An archaic trait of Indo-European morpho-syntax is that plural neuter nouns construe with singular verbs, and quite possibly *yugeh₂ was not so much "yokes" in our sense, but "yokage; a harnessing-up".) Once that much is thought of, however, it is not easy to pin down the details of the "ā-stems" in the Indo-European languages outside of Anatolia, and such an analysis sheds no light at all on the *-yeh₂-/*-ih₂- stems, which (like the *eh₂-stems) form feminine adjective stems and derived nouns (e.g. Sanskrit devī- "goddess" from deva- "god") but unlike the "ā-stems" have no foundation in any neuter category.
- *-eh₂- seems to have formed factitive verbs, as in *new-eh₂- "to renew, make new again", as seen in Latin novāre, Greek neáō and Hittite ne-wa-aḫ-ḫa-an-t- (participle) all "renew" but all three with the pregnant sense of "plow anew; return fallow land to cultivation".
- *-h₂- marked the 1st person singular, with a somewhat confusing distribution: in the thematic active (the familiar -ō ending of Greek and Latin, and Indo-Iranian -ā(mi)), and also in the perfect tense (not really a tense in PIE): *-h₂e as in Greek oîda "I know" < *woyd-h₂e. It is the basis of the Hittite ending -ḫḫi, as in da-aḫ-ḫi "I take" < *-ḫa-i (original *-ḫa embellished with the primary tense marker with subsequent smoothing of the diphthong).
- *-eh₃ may be tentatively identified in a "directive case". No such case is found in Indo-European noun paradigms, but such a construct accounts for a curious collection of Hittite forms like ne-pi-ša "(in)to the sky", ták-na-a "to, into the ground", a-ru-na "to the sea". These are sometimes explained as o-stem datives in -a < *-ōy, an ending clearly attested in Greek and Indo-Iranian, among others, but there are serious problems with such a view, and the forms are highly coherent, functionally. And there are also appropriate adverbs in Greek and Latin (elements lost in productive paradigms sometimes survive in stray forms, like the old instrumental case of the definite article in English expressions like the more the merrier): Greek ánō "upwards, kátō "downwards", Latin quō "whither?", eō "to that place"; and perhaps even the Indic preposition/preverb â "to(ward)" which has no satisfactory competing etymology. (These forms must be distinguished from the similar-looking ones formed to the ablative in *-ōd and with a distinctive "fromness" sense: Greek ópō "whence, from where".)
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