transitive. To cause (a person) to forget or discard previous knowledge. Occasionally const. to with infinitive.

transitive. To cause (a person) to discard or forget previous knowledge; to unteach. Frequently with double object. Chiefly colloquial in later…

(un-, prefix2 affix 1a.)

(un-, prefix2 affix 1d(b).)

transitive. To direct (a person) away from a habit, attitude, etc., by education or training.