antagonistic
an·tag·o·nis·tic
/ænˌtægəˈnıstık/ adj [more ~; most ~]
: showing dislike or opposition : showing antagonism
They found it impossible to deal with such antagonistic groups.
— often + to or toward
Many people are antagonistic [=opposed, hostile] to the idea of making major changes to the building.
The two groups have always been antagonistic toward each other.
She was antagonistic toward the media.
an·tag·o·nis·tic·al·ly /ænˌtægəˈnıstıkli/ adv
Many people reacted antagonistically to her comments.