Where does “ai-” come from?

ai- (Irish) comes from Proto-Indo-European h₂ey- — vital force, life, age, eternity; day, morning.

Ancestry of “ai-”, step by step

ai- traces back through 3 separate lines of ancestry.

via Proto-Indo-European h₂ey-

StepLanguageWordMeaning
1Proto-Indo-Europeanh₂ey-vital force, life, age, eternity; day, morning

via Proto-Slavic u-

StepLanguageWordMeaning
1Proto-Slavicu-away

via Proto-Eskimo *aɣǝ-

StepLanguageWordMeaning
1Proto-Eskimo*aɣǝ-

Words derived from “ai-

Every word from Proto-Indo-European h₂ey-