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

Comments
Eng. grōwan/grow; grēne/green; græs/grass, Gm. gruoen/-- , gruoni/grün, gras/Gras, Goth. gras, ON groa; grænn; gras