Where does “coel” come from?

coel (Middle Welsh) comes from Old Welsh coil(i)ou, from Proto-Brythonic koïl, from Proto-Celtic kailo-, from Proto-Indo-European kóylos — healthy, whole; safe, unharmed.

Ancestry of “coel”, step by step

StepLanguageWordMeaning
1Old Welshcoil(i)ou—
2Proto-Brythonickoïlomen, augury
3Proto-Celtickailo-—
4Proto-Indo-Europeankóyloshealthy, whole; safe, unharmed

Words derived from “coel”

Every word from Proto-Indo-European kóylos →Every word from Proto-Celtic kailo- →Every word from Proto-Brythonic koïl →