bare-knuckle Syllabification: (bare-knuck·le) (also bare-knuckled or bare-knuckles)Definition of bare-knuckle adjective [attributive] (of a boxer or boxing match) without gloves. informal with no scruples or reservations:an apostle of bare-knuckled capitalismbare-knuckle in other Oxford dictionaries Definition of bare-knuckle in the British & World English dictionary