Source : Webster's Revised Unabridged Dictionary (1913)

Demonize \De"mon*ize\, v. t. [imp. & p. p. {Demonized}; p. pr. &
   vb. n. {Demonizing}.] [Cf. LL. daemonizare to be possessed by
   a demon, Gr. ?.]
   1. To convert into a demon; to infuse the principles or fury
      of a demon into.

   2. To control or possess by a demon.

Source : WordNet®

demonize
     v : make into a demon; "Power had demonized him" [syn: {demonise}]