Hostile can be learnt easily by associating it with the word hostel as these two words somewhat sound similar. Further, we can also say that some students are really hostile in hostels.
Pronunciation: hos-tl or, especially Brit., -tahyl
Meaning of hostile (Adjective):
Characteristic of an enemy
Opposite in feeling .e.g. love
Usage of hostile:
It is a hostile place for women.
It was a hostile discussion, which was basically a satire all directed towards one poor soul.
Hostile people find the same people in their environment.