ἐπιστροφεύς
From LSJ
οὐκ ἂν λάβοις παρὰ τοῦ μὴ ἔχοντος → you can't take from one who doesn't have, you can't squeeze blood out of a turnip, you can't get blood out of a turnip, you can't get blood from a stone, you can't get blood out of a stone
English (LSJ)
-έως, ὁ,
A turning on a pivot, a name for the first of the neck-vertebrae, Poll.2.131.
II. one who causes to return to its source, τοῦ γενομένου κόσμου Dam.Pr.270.
German (Pape)
[Seite 986] ὁ, der Umdreher, so hieß der erste Halswirbel, Poll. 2, 131.
Greek (Liddell-Scott)
ἐπιστροφεύς: έως, ὁ, ὄνομα τοῦ πρώτου σπονδύλου τοῦ τραχήλου, «τῶν δὲ σφονδύλων ὁ μὲν πρῶτος, ὁ σὺν τῷ τραχήλῳ στρεφόμενος, ἐπιστροφεὺς ὀνομάζεται» Πολυδ. Β΄, 131.