Where does “*kV-ni-s” come from?

*kV-ni-s (Sino-Tibetan) comes from Proto-Kuki-Chin *ni, from Proto-Sino-Tibetan *kV-ni-s — two.

Ancestry of “*kV-ni-s”, step by step

StepLanguageWordMeaning
1Proto-Kuki-Chin*ni—
2Proto-Sino-Tibetan*kV-ni-stwo
Every word from Proto-Sino-Tibetan *kV-ni-s →Every word from Proto-Kuki-Chin *ni →