In a manner that shows opposition, hostility, or conflict; in an antagonistic way.
From 'antagonistic' + '-ally' (adverbial suffix). Modern English formation from Greek-derived root word with standard English adverbial morphology.
English lets us stack suffixes—'antagonist' + '-ic' + '-al' + '-ly'—to build longer and longer words with tiny meaning shifts, and this stacking is how we express precise emotional and behavioral nuances!
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