The Proto-Indo-European word *ĝerha-
Word *ĝerha-
Meaning to grow, to age, to mature
Synonyms *bhel-3, bhlē-, *gʰreh₁-, *bʰeu(hₓ)-, *hₐel-, *hₐeug-, *wredh-, *hₐwokséye/o-

Comments
Mallory J.P. and Adams D. (2006)