Correct

嘴紧

/ zuǐ jǐn /
Strokes

Example

As an Adjective

tight-lipped; secretive (about); close-mouthed

1
zuǐ
jǐn
  
,
shénme
什么
biè
xiǎng
wèn
chūlái
出来
  

He has a tight mouth. Don't expect that he will tell you anything.