Where does “gŵyl” come from?

gŵyl (Middle Welsh) comes from Proto-Celtic *weilos, from Proto-Indo-European wéy-, from Proto-Indo-European éǵh₂ — I.

Ancestry of “gŵyl”, step by step

StepLanguageWordMeaning
1Proto-Celtic*weilosmodest
2Proto-Indo-Europeanwéy-—
3Proto-Indo-Europeanéǵh₂I

Words derived from “gŵyl”

Every word from Proto-Indo-European éǵh₂ →Every word from Proto-Indo-European wéy- →Every word from Proto-Celtic *weilos →