brutescere

brutescere [LL] , to become (or be) brutish or bestial. sic rationalis creatura ~it J. Sal. Pol. 389C; in bestiam ~it bestiarum dominator Gir. TH II 23; c1427 hec plebs in specie, brutescens conditione (J. Whet. Vers.) Amund. I 230; to be or wax or make fonde, brutere, ~ere, dementare CathA.