Where does “yak” come from?

yak (Uzbek) comes from Persian یک, from Middle Persian ʾywk', from Middle Persian ʾy, from Proto-Iranian Háywah, from Proto-Indo-Iranian Háywas, from Proto-Indo-European óynos — one; single.

yak (Uzbek): one

Definitions

  1. one

Ancestry of “yak”, step by step

StepLanguageWordMeaning
1PersianیکAPI •; one
2Middle Persianʾywk'—
3Middle Persianʾy—
4Proto-IranianHáywahone
5Proto-Indo-IranianHáywasjust, only; one
6Proto-Indo-Europeanóynosone; single
Every word from Proto-Indo-European óynos →Every word from Proto-Indo-Iranian Háywas →Every word from Proto-Iranian Háywah →