Where does “ath-” come from?

ath- (Irish) comes from Old Irish aith-, from Proto-Celtic ati-, from Proto-Indo-European éti, from Proto-Indo-European h₁é, from Proto-Indo-European ǵʰe — Postpositional intensifying particle: indeed, at any rate, in fact.

ath- (Irish): re-, second; old, rejected, ex-; return

Definitions

  1. re-, second; old, rejected, ex-; return

Ancestry of “ath-”, step by step

StepLanguageWordMeaning
1Old Irishaith-re-; second, a further; ex-
2Proto-Celticati-re-, again, second, further
3Proto-Indo-Europeanétibeyond; over
4Proto-Indo-Europeanh₁éand, then
5Proto-Indo-EuropeanǵʰePostpositional intensifying particle: indeed, at any rate, in fact

Words derived from “ath-”

Every word from Proto-Indo-European ǵʰe →Every word from Proto-Indo-European h₁é →Every word from Proto-Indo-European éti →
ath- — Etymology, Origin & Word History | Etymology Explorer