Antagonistic; of an antagonistic character or tendency. Also with to.

Of the nature of antagonists; mutually opposed; incompatible. Later also: displaying antagonism towards someone or something; actively opposed…

That clashes, that clash. Conflicting; disagreeing; mutually interfering.

figurative. Engaged in strife, contending; esp. with plural subject, mutually contending, discordant. of passions, etc.

That counteracts or neutralizes an action, process, etc.; acting in opposition or antagonism to something else.

Acting in opposition; antagonistic.