Source : Webster's Revised Unabridged Dictionary (1913)

Undevil \Un*dev"il\, v. t. [1st pref. un- + devil.]
   To free from possession by a devil or evil spirit; to
   exorcise. [Obs.]

         They boy having gotten a habit of counterfeiting . . .
         would not be undeviled by all their exorcisms.
                                                  --Fuller.