pugnacious

American  

[puhg-ney-shuhs] / pʌgˈneɪ ʃəs /

adjective

1. inclined to quarrel or fight readily; quarrelsome; belligerent; combative.

   Synonyms:

   bellicose, contentious, argumentative

   Antonyms:

   agreeable

---

pugnacious British  

/ pʌɡˈneɪʃəs, pʌɡˈnæsɪtɪ /

adjective

1. readily disposed to fight; belligerent

---

Other Word Forms

• pugnaciously adverb
• pugnaciousness noun
• pugnacity noun
• unpugnacious adjective
• unpugnaciously adverb

Etymology

Origin of pugnacious

First recorded in 1635–45; pugnaci(ty) (from Latin pugnācitās “combativeness,” equivalent to pugnāci-, stem of pugnāx combative (akin to pugil; pugilism ) + -tās -ty ² ) + -ous

Explanation

Pugnacious means ready for a fight. If you're pugnacious, you might find it hard to make friends. On the other hand, you might be a very successful professional boxer one day. Your brother is a pugnacious thug — always ready to use his fists to settle arguments, and he has the strength to do so. That’s the literal sense of pugnacious. You can use pugnacious figuratively, too. When two candidates face off in a debate during a close election, one or the other might be pugnacious. He looks to pick a fight with his opponent and is willing to say almost anything, no matter how outrageous, to make his opponent look bad.

Example Sentences

The Russian mobster decides that the brother-sister act—she pugnacious, he perpetually panic-stricken—can be useful.

From The Wall Street Journal • Apr. 9, 2026

Gulbadin Naib had earlier provided the backbone of Afghanistan's 182-6 with a pugnacious 63 off 35 balls.

From BBC • Feb. 8, 2026

The firm brought a new, more pugnacious approach to the L.A.

From Los Angeles Times • Aug. 26, 2025

And no one coasts on reputation for pugnacious realism, in U.S. politics, like Mario Cuomo’s son.

From Slate • Jun. 17, 2025

Huxley was the most vocal and pugnacious of them all, and earned the nickname of Darwins bulldog.

From "Charles and Emma: The Darwins' Leap of Faith" by Deborah Heiligman