快
Pinyin: kuài
fast
Example sentence
他跑得真快。
Tā pǎo de zhēn kuài.
He runs really fast.
What 快 means
快 (kuài) is a Chinese word meaning “fast”. It belongs to the Describing 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.