ῥάχετρον
From LSJ
κοινὸν τύχη, γνώμη δὲ τῶν κεκτημένων → good luck is anyone's, judgment belongs only to those who possess it
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.