To take away a natural characteristic or inherent property of (a thing or a person).
To combine fissile material with nonfissile material in order to prevent its use in an atomic weapon.
To alter its original form or state, especially of a protein, by heat, acidity etc.
To add something to (alcohol) that makes it unsuitable for consumption but leaves it suitable for most other purposes.
To counterfeit; to forge.
To misrepresent.
To alter so as to make false; to make incorrect.
To prove to be false.
To show (an item of charge inserted in an account) to be wrong.