Definition of “hostile” - Learner’s Dictionary

hostile

adjective uk us /ˈhɒstaɪl/
UNFRIENDLY

unfriendly and not liking or agreeing with something:

Some politicians were very hostile to the idea.
DIFFICULT

unpleasant or not suitable for living or growing:

a hostile climate

(Definition of “hostile” from the Cambridge Learner's Dictionary © Cambridge University Press)