"pugnacious" in the adjective sense
1. hard-bitten, hard-boiled, pugnacious
tough and callous by virtue of experience
2. pugnacious, rough
ready and able to resort to force or violence
"pugnacious spirits...lamented that there was so little prospect of an exhilarating disturbance"- Herman Melville
"they were rough and determined fighting men"
Source: WordNet® (An amazing lexical database of English)
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