酸了 (suānle): (it) has gone sour

Meanings

Niúnǎi fàng jiǔ le, suānle.

The milk sat too long — it's gone sour.

Zhège tāng shì bù shì suānle?

Has this soup turned sour?

usage

酸了 often signals spoilage — used for dairy, soups, or cooked food that has fermented. For an intentionally sour dish that's too sour, prefer 太酸.

酸 suān

了 le