moldy-rancid-taint-stale

She chucked the moldy potatoes in the dustbin.
她把发霉的土豆扔进垃圾箱。
Rancid oil will taint the flavour.
变质的油会破坏味道。
Their daily diet consisted of a lump of stale bread, a bowl of rice and stale water.
他们的日常饮食包括一块不新鲜的面包、一碗米饭和变味的水。