AGONISTIC; AGONISTICAL a.
violent contests, bodily or mental; pertaining to athletic or polemic feats; athletic; combative; hence, strained; unnatural. As a scholar, he [Dr. Parr] was brilliant, but he consumed his power in agonistic displays. De Quincey.
ANTAGONISTIC; ANTAGONISTICAL a.
Opposing in combat, combating; contending or acting against; as, antagonistic forces. -- An*tag`o*nis"tic*al*ly, adv. They were distinct, adverse, even antagonistic. Milman.