(פ') לשלול תכונות טבעיות; לפגל, להשחית טעם

v. alter natural properties; make alcohol unfit to drink

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Verb
1. add nonfissionable material to (fissionable material) so as to make unsuitable for use in an atomic bomb
(hypernym) change, alter, modify
(derivation) denaturant
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
(hypernym) change, alter, modify
(derivation) denaturant
3. make (alcohol) unfit for drinking without impairing usefulness for other purposes
(hypernym) change, alter, modify

v. denature, denaturalize; misrepresent; adulterate, pervert, garble

 Say it 
1. A loss of chemical function, usually due to some heat or chemically-induced structural change. For example, heating a protein causes it to lose its three dimensional form and it no longer functions correctly.