Where does “árchú” come from?

árchú (Old Irish) comes from Old Irish cú, from Primitive Irish ᚉᚒᚅᚐ, from Proto-Celtic kū, from Proto-Indo-European ḱwṓ — dog.

árchú (Old Irish): war-hound, slaughter-hound; watchdog

Definitions

  1. war-hound, slaughter-hound; watchdog

Ancestry of “árchú”, step by step

árchú traces back through two separate lines of ancestry.

via Old Irish cú

StepLanguageWordMeaning
1Old Irishcúdog, hound; wolf
2Primitive Irishᚉᚒᚅᚐhound, wolf
3Proto-Celtickūdog; wolf
4Proto-Indo-Europeanḱwṓdog

via Old Irish ár

StepLanguageWordMeaning
1Old Irishárslaughter, carnage; defeat, destruction
2Proto-Celticagros—
3Proto-Indo-Europeanh₂eǵro-hunt
4Proto-Indo-Europeanh₂eǵ-to drive

Words derived from “árchú”

Every word from Proto-Indo-European ḱwṓ →Every word from Proto-Celtic kū →Every word from Primitive Irish ᚉᚒᚅᚐ →