εὔαδεν

From LSJ

εἰ ἀποκρυπτόντων τῶν Μήδων τὸν ἥλιον ὑπὸ σκιῇ ἔσοιτο πρὸς αὐτοὺς ἡ μάχη καὶ οὐκ ἐν ἡλίῳ → if the Medes hid the sun, the battle would be to them in the shade and not in the sun

Source

French (Bailly abrégé)

3ᵉ sg. ao.2 épq. de ἁνδάνω.
Étymologie: p. ἔϜαδε.