δυσανόδευτος
From LSJ
ὁποία δ' ἦν αὕτη ἡ παίδευσις δύναταί τις γιγνώσκειν διάλογόν τινα τοῦ Πλάτωνος σκοπῶν → It's possible to find out what kind of education that was by examining one of Plato's dialogues
Greek (Liddell-Scott)
δυσανόδευτος: -ον, = τῷ ἑπομ., ὁδὸς Ἐκκλ.