Where does “tosach” come from?

tosach (Old Irish) comes 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 (Old Irish): beginning

Definitions

  1. beginning

Ancestry of “tosach”, step by step

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

Words derived from “tosach

Every word from Proto-Indo-European weyd-Every word from Proto-Indo-European wéydtusEvery word from Proto-Celtic wissus