Answer:
Old English græs, gærs "herb, plant, grass," from Proto-Germanic *grasan (source also of Old Frisian gers "grass, turf, kind of grass," Old Norse, Old Saxon, Dutch, Old High German, German, Gothic gras, Swedish gräs "grass"), which, according to Watkins, is from PIE *ghros- "young shoot, sprout," from root *ghre-
Explanation: