ἀηνής

From LSJ

ὄρνιθι γὰρ καὶ τὴν τότ᾽ αἰσίῳ τύχην παρέσχες ἡμῖν → for it was by a good omen that you provided that past fortune to us

Source

Spanish (DGE)

v. αἰανής.