ἑῆος

From LSJ

οὗτος μὲν ὁ πιθανώτερος τῶν λόγων εἴρηται, δεῖ δὲ καὶ τὸν ἧσσον πιθανόν, ἐπεί γε δὴ λέγεται, ῥηθῆναι → this is the most credible of the stories told; but I must relate the less credible tale also, since they tell it

Source

French (Bailly abrégé)

v. ἐΰς.

Russian (Dvoretsky)

ἑῆος: и ἐῆος gen. к ἐΰς.