rethe:

From Middle English rethe, from Old English rēte ?(“fierce, cruel, savage, severe, stern, austere, zealous, wild, dire”), from Proto-Germanic *rōtijaz ?(“wild”), from Proto-Indo-European *rei-, *rēy- ?(“to scream, shout, roar, bellow, bark, growl”). Cognate with Scots reithe, reythe, reth ?(“rethe”), Old High German ruod ?(“a roar”), Middle High German rüeden ?(“to be noisy”), Bavarian rüeden ?(“to be noisy, roar, be in heat”).