"hostiler" in the adjective sense
1. hostile
characterized by enmity or ill will
"a hostile nation"
"a hostile remark"
"hostile actions"
2. hostile
not belonging to your own country's forces or those of an ally
"hostile naval and air forces"
3. hostile
impossible to bring into friendly accord
"hostile factions"
4. hostile, uncongenial, unfriendly
very unfavorable to life or growth
"a hostile climate"
"an uncongenial atmosphere"
"an uncongenial soil"
"the unfriendly environment at high altitudes"
5. hostile
unsolicited 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"
Source: WordNet® (An amazing lexical database of English)
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