ἐγκαταβυσσόομαι
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 penetrate deeply, Democr.A.77 D.
Greek (Liddell-Scott)
ἐγκαταβυσσόομαι: παθ., εἰσδύομαι, ἐγκαταβυσσοῦσθαι τὰ εἴδωλα διὰ τῶν πόρων εἰς τὰ σώματα Δημόκρ. παρὰ Πλουτ. 2. 735Α.