pugnacious
pug-NAY-shusadjMeaning quick to argue or fight
Memory hook PUG-NACIOUS: a PUG ready to fight. The tiny pug plants his feet and growls at an elephant a hundred times his size: “Come on!” He is pugnacious.
The pugnacious little terrier barked at dogs five times his size.
In context Unlike his calm older sister, Dev was pugnacious; he would argue with anyone about anything, from baseball scores to the color of the sky.
Similar combative, quarrelsome, belligerent, argumentative
Opposite peaceable, agreeable, easygoing
From Latin pugnax, “fond of fighting,” from pugnare, “to fight,” from pugnus, “fist.”