Where does “féinaithne” come from?

féinaithne (Irish) comes from Irish féin-, from Irish féin, from Old Irish féin, from Proto-Celtic *swesin, from Proto-Indo-European swé — self.

féinaithne (Irish): self-knowledge

Definitions

  1. self-knowledge

Ancestry of “féinaithne”, step by step

StepLanguageWordMeaning
1Irishféin-self-, auto-
2Irishféinself; own; even, only
3Old Irishféinself; one's own
4Proto-Celtic*swesin—
5Proto-Indo-Europeanswéself
Every word from Proto-Indo-European swé →Every word from Irish féin- →Every word from Proto-Celtic *swesin →
féinaithne — Etymology, Origin & Word History | Etymology Explorer