ἐπιφυλάσσω
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 watch for, πλοῦν Pl.Lg.866d.
German (Pape)
[Seite 1001] beobachten, abwarten, πλοῦν Plat. Legg. IX, 866 d u. Sp.