9 denatured

denatured
adj[esp attrib 尤作定语]
(a) made unfit for eating and drinking (but possibly still usable for other purposes) 不适於食用或饮用的; 变性的
    denatured alcohol 变性酒精.
(b) having lost its natural qualities 已失去天然特性的
    denatured rubber, ie no longer elastic 失去弹性的橡胶.