/ˈhɒstaɪl/ , /ˈhɑstaɪl/
(chiefly in the plural) An enemy.
Not friendly, appropriate to an enemy; showing the disposition of an enemy; showing ill will and malevolence, or a desire to thwart and injure
a hostile country
Of a hostile takeover.
Microsoft may go hostile in its bid for Yahoo as soon as Friday, according to a published report.