形容词（指含有油脂食物）因变质而有陈腐味道或气味的，（指气味或味道）如陈腐脂肪味的

1. 腐臭的：8. crusty 像壳一样硬的 | 9. rancid 腐臭的 | 10. stagnant 污浊的

1. 七彩网.英语单词

1. （脂肪食物）变坏的，发臭的
If butter, bacon, or other oily foods are rancid, they have gone bad and taste old and unpleasant.

e.g. Butter is perishable and can go rancid.
黄油很容易变质，而且会发臭。
e.g. ...the odour of rancid milk.
腐败牛奶发出的臭味

adj

1. smelling of fermentation or staleness

Synonym: sour

2. (used of decomposing oils or fats) having a rank smell or taste usually due to a chemical change or decomposition

e.g. rancid butter
rancid bacon