praepedimentum
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
Latin > English (Lewis & Short)
praepĕdīmentum: i, n. praepedio,
I a hinderance, impediment (ante-class.), Plaut. Poen. 3, 2, 29; Sid. Ep. 7, 6.