If they fought back, the pugnaciousness was knocked out of them at once.
One evening the latter thought fit to twit him with his pugnaciousness.
When they began feeding upon the tiny forms of life found in the creek, the Bully soon gained a reputation for pugnaciousness.
1640s, a back-formation from pugnacity or else from Latin pugnacis, genitive of pugnax "combative, fond of fighting," from pugnare "to fight," especially with the fists, "contend against," from pugnus "a fist," from PIE *pung-, nasalized form of root *peuk-, *peug- "to stick, stab, to prick" (cf. Greek pyx "with clenched fist," pygme "fist, boxing," pyktes "boxer;" Latin pungere "to pierce, prick").