Antagonistic

They were distinct, adverse, even antagonistic.

Though the tephrosia is a powerful agent, and, if carried too far beyond the antagonistic action of the poison, is, I presume, not entirely without danger, I have never known any bad symptoms to arise from its use.

And deputies from opposing parties, inherently more antagonistic than deputies from the same party, can be bought at a lower price.

The tone of congressional hearings involving tech industry executives in recent years can best be described as antagonistic.