所以
Pinyin: suǒ yǐ
so; therefore
Example sentence
下雨了，所以我没去。
Xià yǔ le, suǒyǐ wǒ méi qù.
It rained, so I didn't go.
What 所以 means
所以 (suǒ yǐ) is a Chinese word meaning “so; therefore”. It belongs to the Grammar Words topic and appears at HSK 2 (and again in HSK 3), so it is one of the words worth learning early when you study Chinese.