Where does “geišero-” come from?

geišero- (Proto-Armenian) comes from Proto-Armenian we(k)še(w)ero-, from Proto-Indo-European wek(ʷ)speros, from Proto-Indo-European we-.

Ancestry of “geišero-”, step by step

Step	Language	Word	Meaning
1	Proto-Armenian	we(k)še(w)ero-	—
2	Proto-Indo-European	wek(ʷ)speros	evening
3	Proto-Indo-European	we-	—

geišero- — Etymology, Origin & Word History | Etymology Explorer