Where does “aicsiu” come from?

aicsiu (Old Irish) comes from Old Irish ad·cí, from Proto-Celtic *adkʷiseti, from Proto-Indo-European kʷeys-, from Proto-Indo-European kʷey- — to pay; to avenge.

Ancestry of “aicsiu”, step by step

StepLanguageWordMeaning
1Old Irishad·císee; sees, notices, observes; perceives,...
2Proto-Celtic*adkʷisetito see
3Proto-Indo-Europeankʷeys-to see; to heed
4Proto-Indo-Europeankʷey-to pay; to avenge

Words derived from “aicsiu

Every word from Proto-Indo-European kʷey-Every word from Proto-Indo-European kʷeys-Every word from Proto-Celtic *adkʷiseti