animosity
an·i·mos·i·ty
/ˌænəˈmɑːsəti/ noun , pl -ties
: a strong feeling of dislike or hatred
[ noncount ] There has always been animosity [=hostility] between them. [=they have always disliked each other]
He felt nothing but animosity toward his boss. [=he disliked his boss very much]
[ count ] We put aside our personal animosities so that we could work together.