Aghul has contrastive epiglottal consonants. Aghul makes, like many Northeast Caucasian languages, a distinction between tense consonants with concomitant length and weak consonants. The tense consonants are characterized by the intensiveness (tension) of articulation, which naturally leads to a lengthening of the consonant, which is the reason why they are traditionally transcribed with the length diacritic. The gemination of the consonant does not by itself create its tension, though morphologically tense consonants do often derive from adjoining two single weak consonants. Some[which?] Aghul dialects have an especially large number[vague] of permitted initial tense consonants.
There are four core cases: absolutive, ergative, genitive, and dative, as well as a large series of location cases. All cases other than the absolutive (which is unmarked) and ergative take the ergative suffix before their own suffix.
Independent and predicative adjectives take number marker and class marker; also case if used as nominal. As attribute they are invariable. Thus idžed "good", ergative, idžedi, etc. -n, -s; pl. idžedar; but Idže insandi hhuč qini "The good man killed the wolf" (subject in ergative case).