Where does “so-” come from?

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

so- (Irish): very; X-able, easy to X

Definitions

  1. very; X-able, easy to X

Ancestry of “so-”, step by step

StepLanguageWordMeaning
1Old Irishso-good
2Proto-Celticsu-good, well
3Proto-Indo-Europeanh₁su-good
4Proto-Indo-Europeanh₁wes-good; to be cheerful, happy; to eat, to feast

Words derived from “so-”

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