酸
Pinyin: suān
sour
Example sentence
这个苹果有点酸。
Zhège píngguǒ yǒudiǎn suān.
This apple is a bit sour.
What 酸 means
酸 (suān) is a Chinese word meaning “sour”. It belongs to the Describing Words topic and appears at HSK 4, so it is one of the words worth learning early when you study Chinese.