early 15c., from Middle French hostilité "enmity" (15c.), or directly from Late Latin hostilitatem (nominative hostilitas) "enmity," from Latin hostilis, from hostis "enemy" (see guest). Hostilities in the sense of "warfare" attested from 1610s.
1. By mid-season the hostility between the two was undisguised.
2. In spite of her hostility, she was attracted to him.
3. There's still an atmosphere of great hostility and tension in the city.
4. There is hostility among traditionalists to this method of teaching history.
5. The reforms come after decades of hostility to revisionism.