From Middle English roren, raren, from Old English rārian (“to roar; wail; lament”), from Proto-West Germanic *rairōn, from Proto-Germanic *rairōną (“to bellow; roar”), from Proto-Indo-European *rey- (“to shout; bellow; yell; bark”), perhaps of imitative origin. Cognate with Saterland Frisian roorje (“to roar”), German röhren (“to roar”).