The Collaborative International Dictionary of English v.0.48:
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. [1913 Webster] 2. To control or possess by a demon. [1913 Webster]WordNet (r) 3.0 (2006):
demonize v 1: make into a demon; "Power had demonized him" [syn: demonize, demonise]