the world > health and disease > mental health > mental illness > degree or type of mental illness > [verb (transitive)] > make unstable or unbalanced (4)
transitive. To disturb or upset (a person's mind, mental faculties, etc.). Now rare.
transitive. In passive. Of the brain, mind, etc.: to become confused or unsound; to be impaired to some degree. Cf. touched, adj. 3. Obsolete.
To unsettle, unbalance, or disorder (the mind, brain, etc.).
transitive. To unbalance, upset.