rancid
adj. 腐臭的；令人作呕的，讨厌的
例句
Rancid oil will taint the flavour.
变质的油会破坏味道。
《柯林斯英汉双解大词典》
Butter is perishable and can go rancid.
黄油会腐败，变哈喇。
We all know that fats spoil by becoming rancid.
我们都知道油脂发臭就变坏了。
