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Verb: pixelize  'pik-su,lIz
  1. To convert an image into a grid of pixels, typically for digital display
    "They pixelized the photograph for use on the website";
    - pixilate, pixelate, pixellate, pixelise [Brit]
     
  2. To blur part of an image by greatly enlarging the pixels, often to obscure sensitive content
    "The news station pixelized the suspect's face in the video";
    - pixilate, pixelate, pixellate, pixelise [Brit]

Derived forms: pixelizing, pixelized, pixelizes