hostile
noun
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troops belonging to the enemy's military forces“the platoon ran into a pack of hostiles”
adjective
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unsolicited and resisted by the management of the target company ( used of attempts to buy or take control of a business)“hostile takeover”
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not belonging to your own country's forces or those of an ally“hostile naval and air forces”
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very unfavorable to life or growth“a hostile climate”uncongenialunfriendly
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characterized by enmity or ill will“a hostile nation”
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impossible to bring into friendly accord“hostile factions”