Where does “gais-” come from?

gais- (Proto-Balto-Slavic) comes from Proto-Indo-European gʷʰēy-.

Ancestry of “gais-”, step by step

StepLanguageWordMeaning
1Proto-Indo-Europeangʷʰēy-

Words derived from “gais-

Every word from Proto-Indo-European gʷʰēy-
gais- — Etymology, Origin & Word History | Etymology Explorer