χορδοτόνον
From LSJ
ὁ φίλος ἐστὶν ἄλλος αὐτός → the friend is another self
English (LSJ)
τό, A tail-piece for keeping the strings taut, Arist.Aud.803a41, Poll.4.62, Nicom.Harm.6. II Adj. proparox. χορδότονος, ον, Pass., stretched with strings, λύρα S.Fr.244 (lyr.).
Russian (Dvoretsky)
χορδοτόνον: τό колок для подтягивания струн Arst.