Stultify

Webster's Dictionary of the English Language

·vt To regard as a fool, or as foolish.

II. Stultify ·vt To allege or prove to be of unsound mind, so that the performance of some act may be avoided.

III. Stultify ·vt To make foolish; to make a fool of; as, to stultify one by imposition; to stultify one's self by silly reasoning or conduct.