ἀφοριστέον
From LSJ
ὃν οὐ τύπτει λόγος οὐδὲ ῥάβδος → if words don't get through, neither a beating will | if the carrot doesn't work, the stick will not work either | whom words do not strike, neither does the rod
English (LSJ)
A one must reject, Arist.EN 1097b34. II one must define or assign, Ph.Bel.92.49, Iamb.Myst. 2.1, Dam.Pr.448; one must separate, τί τινος Gal.9.379, cf. Plot.6.3.1.