ὄπα
From LSJ
οὕτως ἐξ ἐχθρῶν αὐτοκτόνα πέμπετο δῶρα, ἐν χάριτος προφάσει μοῖραν ἔχοντα μόρου → thus mutual gifts that bring death were bestowed by enemies, gifts that brought the lot of death in the name of a favor
French (Bailly abrégé)
acc. de ὄψ.
Greek (Liddell-Scott)
ὄπα: Δωρ. ἀντὶ ὄπη, Πινδ. Ο. 11, 15, κτλ.·
Russian (Dvoretsky)
ὄπα: acc. к ὄψ I.