ἱπποθόρος
From LSJ
ἀψευδεῖ δὲ πρὸς ἄκμονι χάλκευε γλῶσσαν → he forged the tongue on the anvil of no lies
English (LSJ)
ὁ, (θόρνυμι)
A covering mares, esp. of a he-ass kept for breeding mules, Hsch. II as Adj., ἱ. νόμος a tune played to a mare, while she was being covered, Plu. 2.138b,704f.