Where does “tosach” come from?

tosach (Irish) comes from Old Irish tosach, from Proto-Celtic towissākos, from Proto-Celtic *towissus, from Proto-Celtic wissus, from Proto-Indo-European wéydtus, from Proto-Indo-European weyd- — to see.

tosach (Irish): beginning; front; sole

Definitions

  1. beginning; front; sole

Ancestry of “tosach”, step by step

StepLanguageWordMeaning
1Old Irishtosachbeginning
2Proto-Celtictowissākoschief, primary, first
3Proto-Celtic*towissusact of leading, beginning
4Proto-Celticwissusact of discovering, finding out; knowledge
5Proto-Indo-Europeanwéydtus—
6Proto-Indo-Europeanweyd-to see

Words derived from “tosach”

Every word from Proto-Indo-European weyd- →Every word from Proto-Indo-European wéydtus →Every word from Proto-Celtic wissus →