ἀληθομυθέω
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 speak truth, Democr. 225.
Greek (Liddell-Scott)
ἀληθομῡθέω: λαλῶ ἀλήθειαν, Δημόκρ. παρὰ Στοβ. 140. 26· ἀλλ’ ὁ Gaisford καὶ ἄλλοι ἔχουσιν ἀληθομηθεύω.
Spanish (DGE)
decir la verdad Democr.B 225.