κατατετραίνω
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)
found as pres. only in the form κατα-τιτράω Gal.11.402: aor. 1 -έτρησα Plu.2.689c:—
A bore through, perforate, ll.cc.: usu. in pf. Pass., σήραγγας κατατετρημένας cavities bored through it, Pl.Ti.70c, cf. Str.15.1.36; ὁ πλεύμων πόροις κατατέτρηται Plu.2.699a.
