unteachable
From LSJ
Τοὺς δούλους ἔταξεν ὡρισμένου νομίσματος ὁμιλεῖν ταῖς θεραπαινίσιν → He arranged for his male slaves to have sex with female slaves at a fixed price (Plutarch, Life of Cato the Elder 21.2)
adj.
P. and V. οὐ διδακτός.
Slow at learning: Ar. and P. δυσμαθής; see dull.
