agonistic

1. (zoology, anthropology) Characterised by conflict or hostility.Examples: "Although most agonistic interactions consist of signals of threat and submission, symbolic aggression is effective only because the possibility of escalation exists […]"; "This was clearly such an event, but like the ancient religion of Israel, it was also deeply agonistic."; "Sociality swung wildly between extremes of collective affiliation and agonistic striving for dominance."

2. (rhetoric) Argumentative; combative.Examples: "Sharply Frank said, “A place like this is a crimp in your plan, isn’t it?” Boone’s gaze returned to him. The surrounding crowd slipped away, sensing the agonistic nature of the exchange."rhetoric

3. (pharmacology, biochemistry) Pertaining to an agonist.