Correct

不透风

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Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/不透风-Chinese-idioms-Cchatty-74cd6911-dba1-4923-979a-071e11783371-1612776271.jpg

Collocation

1
没有不透风的墙
2
一点都不透风
3
密不透风

Definition

不透风:

Literally means:

airtight; tightly enclosed

Actually means:

It means that there are a lot of people, or that something is tightly packaged.

It figuratively means no information will be divulged under a complete news-blockade.

指人很多,或东西包得很紧。

比喻不走漏消息,消息封锁很严密。

Example

Used as predicate or attributive. (作谓语、定语)
1
Zhège
这个
hǎo
不好
de
xiāoxi
消息
běnlái
本来
xiǎng
bǎo
保密
  
,
dànshì
但是
shìshàng
世上
méiyǒutòufēngdeqiáng
没有不透风的墙
  
,
shuí
xiǎng
èr
第二
tiān
jiā
大家
dōu
zhīdào
知道
le
  

This bad news he would like to keep secret, but there is no windy wall in the world, who want to know the next day.

2
duì
尼克斯队
de
qiánfēng
前锋
wēilián
威廉姆斯
chéngrèn
承认
  
,
gōngniúduì
公牛队
de
fángshǒu
防守
tòufēng
密不透风
  
,
自己
gēnběn
根本
zhǎo
budào
不到
kǒu
突破口
  

Knicks forward Williams also admitted that the Bulls' defense was so tight that he couldn't find a break.

3
Qiúyuán
球员
men
jiéshù
结束
le
shǒu
táng
xùnliàn
训练课
hòu
  
,
jiàoliàn
教练
yùndòngyuán
运动员
shuí
dōu
yuàn
duō
shuō
gōu
  
,
hǎoxiàng
好像
tòufēng
密不透风
  

After the players had finished their first training session, drasto coaches and athletes were reluctant to say more, as if they were in the air.