“+ adjective
Etymology: Middle English, from un- (I) + bridled, past participle of bridlen to bridle
1. : not confined by a bridle
2. : completely at liberty : unrestrained , ungoverned , unchecked
extolled the benevolence of unbridled competition in human affairs — Joseph Schiffman
fantastic charges and unbridled insults — William Ridsdale
unbridled enthusiasm