Con

Con

adv.
  1. Against the affirmative side; in opposition; on the negative side; -- The antithesis of pro, and usually in connection with it. See Pro.

Con

v. t.

imp. & p. p. Conned; p. pr. & vb. n. Conning

  1. To know; to understand; to acknowledge. [Obs.]
    Of muses, Hobbinol, I con no skill.
    They say they con to heaven the highway.
  2. To study in order to know; to peruse; to learn; to commit to memory; to regard studiously.
    Fixedly did look Upon the muddy waters which he conned As if he had been reading in a book.
    I did not come into Parliament to con my lesson.

Phrases & Compounds
To con answer
to be able to answer.
To con thanks
to thank; to acknowledge obligation.

Con

v. t.
  1. To conduct, or superintend the steering of (a vessel); to watch the course of (a vessel) and direct the helmsman how to steer. (Naut.)