φρενοβλαβία
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)
ἡ, poet. φρενοβλαβίη, for φρενοβλάβεια, Man.6.599.
German (Pape)
[Seite 1304] ἡ, poet. statt φρενοβλάβεια, Maneth. 6, 599.