IPA: /hɒsˈtɪl.ɪ.ti/
KK: /hɑstɪlɪti/
The state of being unfriendly or having a strong dislike towards someone or something.
There was a lot of hostility between the two rival teams during the match.
Hostility is formed from "hostis" (meaning enemy) and the suffix "-ity" (meaning the state or condition of). The word describes the state of being an enemy or being unfriendly.
Think of 'hostis' meaning enemy to remember that 'hostility' refers to the state of being unfriendly or antagonistic.