Source : Webster's Revised Unabridged Dictionary (1913)

Dehumanize \De*hu"man*ize\, v. t.
   To divest of human qualities, such as pity, tenderness, etc.;
   as, dehumanizing influences.

Source : WordNet®

dehumanize
     v 1: deprive of human qualities; "Life in povery has dehumanized
          them" [syn: {dehumanise}] [ant: {humanize}]
     2: make mechanical or routine [syn: {dehumanise}]