ἐπίπαγος
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)
ὁ, (ἐπιπήγνυμι)
A congealed or hardened crust on the top of a thing, Dsc.1.101.2, Aret.SA1.9, Gal.Lex.s.v. σύναγμα; ἐ. ὑμενώδης capsule of lens, Ruf.Anat.17; ἁλώδης Plu.2.627f; = γραῦς 11, scum, Hsch., cf. Gal.6.252.
German (Pape)
[Seite 967] ὁ, die auf der Milch u. ä. geronnene Haut, Kruste, Diosc.; ἁλώδης, Plut. Symp. 1, 9, 4. S. γραῦς.