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
sub-volvo: ĕre, v. a.,
I to roll up or along: manibus saxa, Verg. A. 1, 424.