Where does “cathach” come from?

cathach (Irish) comes from Old Irish cathach, from Old Irish cath, from Primitive Irish ᚉᚐᚈᚈᚒ, from Proto-Celtic katus, from Proto-Indo-European kéh₃tus, from Proto-Indo-European -tus — Derives action nouns from verb roots.

cathach (Irish): battle reliquary; battling, warlike; Alternative...

Definitions

  1. battle reliquary; battling, warlike; Alternative...

Ancestry of “cathach”, step by step

StepLanguageWordMeaning
1Old Irishcathachbellicose, warlike; vehement, forceful; relic,...
2Old Irishcathbattle, fight; troop, battalion
3Primitive Irishᚉᚐᚈᚈᚒbattle
4Proto-Celtickatusbattle
5Proto-Indo-Europeankéh₃tusfight
6Proto-Indo-European-tusDerives action nouns from verb roots
Every word from Proto-Indo-European -tus →Every word from Proto-Indo-European kéh₃tus →Every word from Proto-Celtic katus →
cathach — Etymology, Origin & Word History | Etymology Explorer