antagonista
From LSJ
ἄλλαι μὲν βουλαὶ ἀνθρώπων, ἄλλα δὲ Θεὸς κελεύει → man proposes, God disposes | men's wishes are different from what God orders | man's will is often different than God's decisions
Latin > English (Lewis & Short)
antăgōnista: ae, m., = ἀνταγωνιστής,
I an adversary, opponent, antagonist, Hier. Vit. Hil. fin.