Source : Webster's Revised Unabridged Dictionary (1913)

Disenable \Dis`en*a"ble\, v. t. [Pref. dis- + enable.]
   To disable; to disqualify.

         The sight of it might damp me and disenable me to
         speak.                                   --State Trials
                                                  (1640).

Source : WordNet®

disenable
     v : make unable to perform a certain action; "disable this
         command on your computer" [syn: {disable}, {incapacitate}]
         [ant: {enable}]