ἀμαθαίνω
From LSJ
ἀρετὰ γὰρ ἐπαινεομένα δένδρον ὣς ἀέξεται → for virtue that is praised grows like a tree, praised virtue will grow like a tree
English (LSJ)
(ἀμαθής)
A to be untaught, ignorant, only pres.; abs., Pl.R.535e, Ph.1.498, Aristid.34(50).44, Plot.4.4.24; ἀ. τι or εἴς τι to be ignorant in a thing, Pl.Lg.689c, 689d.
German (Pape)
[Seite 114] unwissend, dumm sein, Plat. Legg. III, 697 e, öfter; εἴς τι, in etwas, 689 d, u. vorher an derselben Stelle ταῦτα, etwas nicht wissen.