denature

Verb
  1. Add nonfissionable material to (fissionable material) so as to make unsuitable for use in an atomic bomb (synset 200555187)
  2. Modify (as a native protein) especially by heat, acid, alkali, or ultraviolet radiation so that all of the original properties are removed or diminished (synset 200554951)
  3. Make (alcohol) unfit for drinking without impairing usefulness for other purposes (synset 200554804)

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