HSK 4
赶快
gǎnkuài副
quickly; at once
上课快开始了赶快进来。
Shàng kè kuài kāi shǐ le gǎn kuài jìn lái.
Class is about to begin; come in quickly.
Say it
Hold the button, say it, then let go.
Other HSK words sharing a character
Also free:
New in the HSK 3.0 word list at level 4.