Correct

暗刀子

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Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/暗刀子-Chinese-idioms-Cchatty-a4773a42-c336-42a7-812e-c9a56edb4980-1612777449.jpg

Collocation

1
小心暗刀子
2
当心暗刀子
3
使暗刀子
4
捅暗刀子
5
暗刀子施防
6
暗刀子伤人

Definition

暗刀子:

Literally means:

a stab in the back; attack by a hidden enemy.

Actually means:

It means beating, framing or hurting someone in the dark.

It is often used to mean plotting against someone behind his back.

It carries a derogatory sense.

暗刀子,比喻暗中用某种手段打击、陷害或伤害别人。

多指背后暗算别人。具有贬义色彩。

Example

Used as subject or object. (作主语、宾语)
1
shì
shí
十足
de
xiǎorén
小人
  
,
dāng
hǎo
péngyou
朋友
  
,
què
àn
dāozi
刀子
shāngrén
伤人
  
,
zài
lǎobǎn
老板
miànqián
面前
shuō
de
huàihuà
坏话
  

He is a very small man, I regard him as a good friend, but he hurts people with a knife and says bad things about me in front of his boss.

2
Lǎo
老马
xīnxiǎng
心想
  
,
dìng
一定
shì
yǒurén
有人
shǐ
使
le
àn
dāozi
刀子
  
,
cái
huì
bèi
diào
dào
zhège
这个
piān
偏僻
de
xiǎozhèn
小镇
de
  

The old horse thought to him that someone must have made a dark knife before he could be transferred to this remote town.

3
Shèhuì
社会
shàng
de
shìqing
事情
hěn
复杂
  
,
chǔshì
处事
yào
xiǎoxīnjǐnshèn
小心谨慎
  
,
dāngxīn
当心
biéren
别人
tǒng
àn
dāozi
刀子
  

Things in society are complicated, you have to be careful when you do things, when others stab the knife.