antogonista is incorrectly written, and should be written as "antagonist" being its meaning:
Of Greek etymology: antagonistes antagonistou: antagonist, contrary, adversary of ant-: prefix ( against ) and agonistou agonistes: athlete, competitor, rival: athlete who struggled against another. For us, the antagonist is the opponent who fight or compete against one another in any field and not just the sport, as among the Greeks. For them, agon agonos meant Assembly oriented games, game, competition, contest, competition, fight, danger, anguish.