Of a person: not disposed to peace; restless, argumentative, disruptive. Also (of an action, intention, etc.): involving or tending towards…

Characterized by or involving contention.

Full of strife or conflict; contentious.

Contentious.

Full of strife, quarrelsome, contentious.

Marked or characterized by strife or contention, or by earnest striving.

Combative; aggressively persistent; strongly espousing a cause; entrenched, adamant.

Of, relating to, or involving conflict; contentious.

Of, relating to, or characterized by conflict, hostility, or opposition; involving adversaries or opposing parties. Cf. adversary, adj.

= adversarial, adj. (in either sense).

Of, pertaining to, or characterized by conflict; of a situation, etc.: having conflict as an essential component.

That expresses or is characterized by a desire to insult or to demonstrate defiant indifference; confrontational, provocative.

characterized by or likely to cause confrontation (sense 3); aggressive, marked by an adversarial approach.