1. unteachable - Noun
2. unteachable - Adjective
unteachable (comparative more unteachable, superlative most unteachable)
Not teachable.
unteachable (plural unteachables)
Someone who cannot be taught.
And I think it better not to put anything quite so ugly and intrinsically unteachable into a one-hour crash course on writing your first novel. Source: Internet
Linebackers Clayton Perrin and Anthony McKeel were both great athletes with unteachable instincts to get to the ball. Source: Internet
The president is impulsive, uncontrollable and unteachable, burdened with an ignorance he doesn’t have the self-awareness to realize he has or the discipline to overcome it. Source: Internet