What does antagonistic or antagonistical mean?
The definition of antagonistic and antagonistical
An*tag`o*nis”tic, An*tag`o*nis”tic*al, 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.