Correct

一棍子打死

/ yī gùnzi dǎsǐ /
Strokes

Definition

to deal a single fatal blow/(fig.) to totally repudiate sb because of a minor error

Example

Definition

knock sb down at one stroke; finish off with one/a single blow; completely negate

1
néng
yīnwèi
因为
yǒu
cuò
错误
jiù
jiāng
gùnzi
一棍子打死
  

We can't write him off as worthless because he has made some mistakes.

2
Duì
fàn
cuò
错误
de
tóngshì
同事
  
,
yào
píng
批评
bāngzhù
帮助
  
,
néng
gùnzi
一棍子打死
  

Instead of bludgeoning our erring colleagues, we should help them with criticism.