an·tag·o·nism /ænˈtægəˌnɪzəm/ 名詞
an·tag·o·nism n. Opposition of action; counteraction or contrariety of things or principles.
Note: ☞ We speak of antagonism between two things, to or against a thing, and sometimes with a thing.
n 1: a state of deep-seated ill-will [syn: hostility, enmity]
2: the relation between opposing principles or forces or
factors; "the inherent antagonism of capitalism and
3: an actively expressed feeling of dislike and hostility
4: (biochemistry) interference in or inhibition of the
physiological action of a chemical substance by another
having a similar structure