ἐπιστασιάζω
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
English (LSJ)
A to be at variance further, S.E.M.11.37.
German (Pape)
[Seite 982] dabei, darüber uneinig sein, Sext. Emp. adv. eth. 37.