Source : Webster's Revised Unabridged Dictionary (1913)

Dehort \De*hort"\, v. t. [imp. & p. p. {Dehorted}; p. pr. & vb.
   n. {Dehorting}.] [L. dehortari; de- + hortari to urge,
   exhort.]
   To urge to abstain or refrain; to dissuade. [Obs.]

         The apostles vehemently dehort us from unbelief. --Bp.
                                                  Ward.

         ``Exhort'' remains, but dehort, a word whose place
         neither ``dissuade'' nor any other exactly supplies,
         has escaped us.                          --Trench.