uneducable
/ˌʌnɪˈdjuːkəbəl/Definitions
1. adjective
Not capable of being educated or taught; too stubborn or resistant to learn.
“The child’s behavior made her uneducable in the classroom.”
2. noun
A person who is not capable of being educated or taught; often due to stubbornness or resistance to learn.
“The teacher had to deal with an uneducable student who refused to follow the rules.”