The Collaborative International Dictionary of English v.0.48:

Dissuade \Dis*suade"\, v. t. [imp. & p. p. Dissuaded; p. pr. &
   vb. n. Dissuading.] [L. dissuadere, dissuasum; dis- +
   suadere to advise, persuade: cf. F. dissuader. See
   Suasion.]
   1. To advise or exhort against; to try to persuade (one from
      a course). [Obsolescent]
      [1913 Webster]

            Mr. Burchell, on the contrary, dissuaded her with
            great ardor: and I stood neuter.      --Goldsmith.
      [1913 Webster]

            War, therefore, open or concealed, alike
            My voice dissuades.                   --Milton.
      [1913 Webster]

   2. To divert by persuasion; to turn from a purpose by reasons
      or motives; -- with from; as, I could not dissuade him
      from his purpose.
      [1913 Webster]

            I have tried what is possible to dissuade him.
                                                  --Mad. D'
                                                  Arblay.
      [1913 Webster]