酸 Strokes Write it Listen 酸 suān sour; tart; sick at heart HSK 4 14 strokes Radical 酉 Ideograph 5 words Built from酉yǒuwine; wine vessel; chemical夋qūnto dawdle; the emperor Yao's father How it worksWine 酉 aged too long 夋; 夋 also provides the pronunciation.