Source : Webster's Revised Unabridged Dictionary (1913)

Bestialize \Bes"tial*ize\, v. t. [imp. & p. p. {Bestialized}; p.
   pr. & vb. n. {Bestializing}.]
   To make bestial, or like a beast; to degrade; to brutalize.

         The process of bestializing humanity.    --Hare.

Source : WordNet®

bestialize
     v : make brutal and depraved; give animal-like qualities to
         [syn: {bestialise}]