(s)hostile, uncongenial, unfriendlyvery unfavorable to life or growth“a hostile climate”, “an uncongenial atmosphere”, “an uncongenial soil”, “the unfriendly environment at high altitudes”
(s)hostileunsolicited and resisted by the management of the target company (used of attempts to buy or take control of a business)“hostile takeover”, “hostile tender offer”, “hostile bid”