pugnacious

The pugnacious dog barked loudly at the mailman.

His pugnacious attitude often leads to conflicts with his coworkers.

The pugnacious boxer entered the ring with confidence.

She had a pugnacious expression on her face during the argument.

The pugnacious player was ejected from the game for starting a fight.

Her pugnacious nature often gets her into trouble.

The team captain's pugnacious spirit inspired his teammates to play harder.

Despite his pugnacious reputation, he was actually quite friendly in person.

The pugnacious debate lasted for hours without reaching a resolution.

His pugnacious behavior often alienates those around him.