The Proto-Indo-European word *h₂eiw-
Word *h₂eiw-
Meaning vital force
Synonyms *hₐóyus, *wéihₓ(e)s-

Comments
Skr. āyu, Lat. aevum, Av. āyū, Toch. āym/, Eng. æfre/ever, Gm. īo/je; êwig/ewig, Goth. aiws, ON ei, Gk. aiōn, Alb. eshë