Where does “aontreo” come from?

aontreo (Irish) comes from Irish aon, from Old Irish óen, from Proto-Celtic oinos, from Proto-Indo-European óynos — one; single.

aontreo (Irish): one-way

Definitions

  1. one-way

Ancestry of “aontreo”, step by step

aontreo traces back through two separate lines of ancestry.

via Irish aon

StepLanguageWordMeaning
1Irishaonone; any; breast, chimney-piece
2Old Irishóenone
3Proto-Celticoinosone
4Proto-Indo-Europeanóynosone; single

via Irish treo

StepLanguageWordMeaning
1Irishtreoway, direction; trend, drift; strike
Every word from Proto-Indo-European óynos →Every word from Proto-Celtic oinos →Every word from Old Irish óen →