ῥάχετρον
From LSJ
πείθεται πᾶς ἥδιον ἢ βιάζεται (Dio Cassius, Historiae Romanae 8.36.3) → it's always more pleasant to be persuaded than to be forced
English (LSJ)
τό,= ῥάχις, Hsch.; acc. to Phot.
A the beginning of the spine, acc. to Poll.2.136 the middle; = πλευρόν, Did. ap. Phot. II butcher's knife or chopper, Poll.7.25; Hsch. cites βράκετον (leg. -τρον) = δρέπανον.
German (Pape)
[Seite 835] τό, der Anfang, die Mitte des Rückgrates, das Rückgrat selbst, Hesych. u. a. VLL.