Dzongkha numerals

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Dzongkha, the national language of Bhutan, has two numeral systems, one vigesimal (base 20), and a modern decimal system. The vigesimal system remains in robust use. Ten is an auxiliary base: the teens are formed with ten and the numerals 1–9.

Vigesimal[edit]

1 ciː 11 cu-ci
2 ˈɲiː 12 cu-ɲi
3 sum 13 cu-sum
4 ʑi 14 cu-ʑi
5 ˈŋa 15 ce-ŋa
6 ɖʱuː 16 cu-ɖu
7 dyn 17 cup-dỹ
8 ɡeː 18 cop-ɡe
9 ɡuː 19 cy-ɡu
10 cu-tʰãm* 20 kʰe ciː

*When it appears on its own, 'ten' is usually said cu-tʰãm 'a full ten'. In combinations it is simply cu.

Factors of 20 are formed from kʰe. Intermediate factors of ten are formed with pɟʱe-da 'half to':

30 kʰe pɟʱe-da ˈɲiː (a half to two score)
40 kʰe ˈɲiː (two score)
50 kʰe pɟʱe-da sum (a half to three score)
100 kʰe ˈŋa (five score)
200 kʰe cutʰãm (ten score)
300 kʰe ceŋa (fifteen score)

400 (202) ɲiɕu is the next unit: ɲiɕu ciː 400, ɲiɕu ɲi 800, etc. Higher powers are 8000 (203) kʰecʰe ('a ɡreat score') and jãːcʰe 160,000 (204).

Decimal[edit]

The decimal system is the same as the vigesimal system up to 19. Then decades, however, are formed as unit–ten, as in Chinese, and the hundreds similarly. 20 is reported to be ɲiɕu, the vigesimal numeral 400; this may be lexical interference for the expected *ɲi-cu. (In any case, there is no ambiguity, because as 400 it is obligatorily ɲiɕu ciː 'one 400'.) Several of the decades have an epenthetic -p-, perhaps by analogy with 18 and 19, where the -p- presumably reflects a historical *cup 'ten':

sum-cu 30, ʑi-p-cu 40, ˈŋa-p-cu 50, ɟa-tʰampa or cik-ɟa 100 (a 'full hundred' or 'one hundred'), ɲi-ɟa 200, sum-ɟa 300, ʑi-p-ɟa 400, etc.

References[edit]