Where does “athrú” come from?

athrú (Irish) comes from Irish athraigh, from Middle Irish aithrigid, from Old Irish ad·eirrig, from Proto-Celtic regeti, from Proto-Indo-European h₃reǵ- — to straighten, to right oneself; right; just.

athrú (Irish): verbal noun of athraigh: changing; change,...

Definitions

  1. verbal noun of athraigh: changing; change,...

Ancestry of “athrú”, step by step

athrú traces back through two separate lines of ancestry.

via Irish athraigh

StepLanguageWordMeaning
1Irishathraighchange, vary; change, alter; move
2Middle Irishaithrigidto change, alter, move
3Old Irishad·eirrigto repeat, reiterate; change; repeats,...
4Proto-Celticregetito stretch; to straighten
5Proto-Indo-Europeanh₃reǵ-to straighten, to right oneself; right; just

via Irish U

StepLanguageWordMeaning
1IrishU
Every word from Proto-Indo-European h₃reǵ-Every word from Proto-Celtic regetiEvery word from Old Irish ad·eirrig