Where does “wah” come from?

wah (Proto-Iranian) comes from Proto-Indo-Iranian was, from Proto-Indo-European wōs.

Ancestry of “wah”, step by step

StepLanguageWordMeaning
1Proto-Indo-Iranianwasaccusative/genitive/dative plural of *túH
2Proto-Indo-Europeanwōs—

Words derived from “wah”

Every word from Proto-Indo-European wōs →Every word from Proto-Indo-Iranian was →