Where does “hy-” come from?

hy- (Welsh) comes from Proto-Celtic su-, from Proto-Indo-European h₁su-, from Proto-Indo-European h₁wes- — good; to be cheerful, happy; to eat, to feast.

hy- (Welsh): affirmative prefix, emphasises prefixed word

Definitions

  1. affirmative prefix, emphasises prefixed word

Ancestry of “hy-”, step by step

StepLanguageWordMeaning
1Proto-Celticsu-good, well
2Proto-Indo-Europeanh₁su-good
3Proto-Indo-Europeanh₁wes-good; to be cheerful, happy; to eat, to feast

Words derived from “hy-”

Every word from Proto-Indo-European h₁wes- →Every word from Proto-Indo-European h₁su- →Every word from Proto-Celtic su- →