Where does “hwyliau” come from?

hwyliau (Welsh) comes from Welsh hwyl, from Proto-Brythonic huɨl.

Ancestry of “hwyliau”, step by step

StepLanguageWordMeaning
1Welshhwylsail; mood; fun
2Proto-Brythonichuɨl—
Every word from Proto-Brythonic huɨl →Every word from Welsh hwyl →