denatured

adj

1. (not-comparable)Having been deprived of its nature, having had its nature changed.
2. (not-comparable)Of alcohol: made undrinkable by adding a toxin or unpalatable substance, but still useful as a fuel or solvent. Traditionally achieved by the addition of methanol (wood alcohol) to ethanol (grain alcohol).

verb

1. (form-of, participle, past)simple past and past participle of denature