hostile in WordNet English dictionary

1. troops belonging to the enemy's military forces
   "the platoon ran into a pack of hostiles"
   hostile 
   

1. characterized by enmity or ill will
   "a hostile nation"; "a hostile remark"; "hostile actions"
   hostile 
   
2. not belonging to your own country's forces or those of an ally
   "hostile naval and air forces"
   hostile 
   
3. 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"
   hostile 
   
4. very unfavorable to life or growth
   "a hostile climate"; "an uncongenial atmosphere"; "an uncongenial soil"; "the unfriendly environment at high altitudes"
   hostile  uncongenial  unfriendly 
   
5. impossible to bring into friendly accord
   "hostile factions"
   hostile