Con

Webster's Dictionary of the English Language

·vt To Know; to Understand; to Acknowledge.

II. Con ·vt To conduct, or superintend the steering of (a vessel); to watch the course of (a vessel) and direct the helmsman how to steer.

III. Con ·vt To study in order to know; to Peruse; to Learn; to commit to memory; to regard studiously.

IV. Con ·adv Against the affirmative side; in opposition; on the negative side;

— The antithesis of pro, and usually in connection with it. ·see Pro.