Where does “saigh” come from?

saigh (Goidelic) comes from Old Irish saidid, from Proto-Celtic sedeti, from Proto-Indo-European sḗd- — to sit.

Ancestry of “saigh”, step by step

StepLanguageWordMeaning
1Old Irishsaididto sit
2Proto-Celticsedetito sit
3Proto-Indo-Europeansḗd-to sit

Words derived from “saigh”

Every word from Proto-Indo-European sḗd- →Every word from Proto-Celtic sedeti →Every word from Old Irish saidid →