denature
verb
de·na·ture
(ˌ)dē-ˈnā-chər
denatured; denaturing
(ˌ)dē-ˈnā-ch(ə-)riŋ
1
2
: to deprive of natural qualities : change the nature of: such as
a
: to make (alcohol) unfit for drinking (as by adding an obnoxious substance) without impairing usefulness for other purposes
b
: to modify the molecular structure of (something, such as a protein or DNA) especially by heat, acid, alkali, or ultraviolet radiation so as to destroy or diminish some of the original properties and especially the specific biological activity
: to become denatured
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Merriam-Webster unabridged
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