Where does “wāy-” come from?

wāy- (Proto-Indo-European) comes from Proto-Indo-European wē- — to winnow, thresh; to blow, to breathe.

Ancestry of “wāy-”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	wē-	to winnow, thresh; to blow, to breathe

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