Disconcert

Webster's Dictionary of the English Language

·noun Want of concert; disagreement.

II. Disconcert ·vt To confuse the faculties of; to disturb the composure of; to Discompose; to Abash.

III. Disconcert ·vt To break up the harmonious progress of; to throw into disorder or confusion; as, the emperor disconcerted the plans of his enemy.