To add something to (alcohol) that makes it unsuitable for consumption but leaves it suitable for most other purposes.
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 make weaker or less strong.
To become weaker or less strong.