Correct

张不开口

/ zhāng bù kāi kǒu /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/张不开口-Chinese-idioms-Cchatty-9d5f2996-cb95-4b70-96ad-7d6a3ecdc373-1612777039.jpg

Collocation

1
跟……张不开口
2
觉得张不开口
3
张不开口也得张
4
有什么张不开口的
5
张不开口请人家……
6
张不开口告诉……
7
实在张不开口

Definition

张不开口

Literally means:

be unable to open one's mouth; feel embarrassed to say something directly

Actually means:

It figuratively means one feels embarrassed to say something frankly. It usually connotes that one feels it is inappropriate to say something directly considering the others' feeling, or due to the wrong occasion.

比喻有事不好意思说出来。多因碍于情面,或时机、场合不合适而不便说出来。

Example

Used as predicate or object. (作谓语、宾语)
1
qīn
父亲
shēngbìng
生病
  
,
láixìn
来信
yào
huíqu
回去
  
,
shì
可是
xiànzài
现在
gōngzuò
工作
zhème
这么
máng
  
,
shízài
实在
zhāng
kāikǒu
开口
xiàng
lǐngdǎo
领导
qǐngjià
请假
  

Father is ill, the letter asked him to go back, but now the work is so busy, he really did not open his mouth to the leader to ask for leave.

2
guǒ
如果
wèile
为了
biède
别的
shì
zhǎo
父母
jiè
qián
  
,
zànchéng
赞成
  
,
shì
可是
xiànzài
现在
shì
wèile
为了
jiùrén
救人
  
,
zhāng
kāikǒu
开口
de
zhāng
  

If you ask your parents to borrow money for something else, I don't approve, but now you're trying to save people.

3
hěn
huan
喜欢
xiǎolán
小兰
  
,
hěn
xiǎng
chéngwéi
成为
de
nánpéngyou
男朋友
  
,
shì
可是
měi
每次
pèngdào
碰到
xiǎolán
小兰
yòu
juéde
觉得
zhāng
kāikǒu
开口
  

He likes Xiaolan very much and wants to be her boyfriend, but every time he meets Xiaolan, he doesn't want to talk.