unteachable

unteachable
adj.
P. and V. οὐ δῐδακτός.
Slow at learning: Ar. and P. δυσμᾰθής ; see dull.

unteachable: indŏcĭlis, e (of persons): Cic. N. D. 1, 5, 12: Plin.: Hor.: an u. system, i. disciplina, Cic. Acad. 2, 1, 1.