"denature" in the verb sense
1. denature
add nonfissionable material to (fissionable material) so as to make unsuitable for use in an atomic bomb
2. denature
modify (as a native protein) especially by heat, acid, alkali, or ultraviolet radiation so that all of the original properties are removed or diminished
3. denature
make (alcohol) unfit for drinking without impairing usefulness for other purposes
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