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
SourceFrench (Bailly abrégé)
impf. de περίειμι¹.
Russian (Dvoretsky)
περιῆν: impf. к περίειμι I.
Dutch (Woordenboekgrieks.nl)
περιῆν imperf. van 1. περίειμι.