Where does “tri” come from?

tri (Proto-Brythonic) comes from Proto-Celtic trīs, from Proto-Indo-European *tréyes.

tri (Proto-Brythonic): three

Definitions

  1. three

Ancestry of “tri”, step by step

StepLanguageWordMeaning
1Proto-Celtictrīsthree
2Proto-Indo-European*tréyes—

Words derived from “tri”

Every word from Proto-Indo-European *tréyes →Every word from Proto-Celtic trīs →
tri — Etymology, Origin & Word History | Etymology Explorer