Unteachable (adjective)

Not able to be taught.

Origin:

The word "unteachable" is formed from the word "un" and "teachable" which means capable of being taught.

Examples:

1. The student was considered unteachable and was expelled from school.
2. He was found to be unteachable and did not learn from his mistakes.
3. The dog was unteachable and could not be trained.
4. The subject was considered unteachable and was removed from the curriculum.
5. The child was considered unteachable and was placed in a special education program.