1. eager or quick to argue, quarrel, or fight; combative in nature
He had a pugnacious attitude and was always ready for a confrontation.
Ele tinha uma atitude belicosa e estava sempre pronto para uma confrontação.
2. involving or characterized by fighting or aggression
The boxer's pugnacious style made him a formidable opponent.
O estilo belicoso do boxeador o tornava um oponente formidável.