In a warlike, aggressive, or hostile manner; with a combative attitude or temperament.
From Latin 'bellicosus' (warlike, from 'bellum' meaning war) + '-ly' (adverb suffix). The root 'bellum' also appears in words like 'bellicose,' 'rebellion,' and 'belligerent.'
The Latin root 'bellum' (war) is hiding inside so many English words—'bellicosely' takes that Latin concept and turns it into an adverb describing how someone acts when they're spoiling for a fight!
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