δυσαποδίδακτος
From LSJ
οὐκ ἔστ' ἀλώπηξ ἡ μὲν εἴρων τῇ φύσει ἡ δ' αὐθέκαστος → foxes are not one of a treacherous nature and the other straightforward, the nature of foxes is not for one to be treacherous and the other straightforward
English (LSJ)
[ῐ], ον, hard to unlearn, J.AJ16.2.4.
Spanish (DGE)
-ον
difícil de olvidar, inolvidable τὸ τοῦ χρόνου τιμητόν Nic.Dam.142.
German (Pape)
[Seite 676] schwerzu verlernen, Ios.
Greek (Liddell-Scott)
δυσαποδίδακτος: -ον, ὃν εἶναι δύσκολον νὰ ἀπομάθῃ τις, νὰ λησμονήσῃ, Ἰώσηπ. Α. Ι. 16. 2, 4.