Correct

无补

/ wúbǔ / 
Strokes

Definition

of no avail/not helping in the least

Example

As a Verb

be of no help/avail

1
Xiànzài
现在
kū
哭
yě
也
yúshìwúbǔ
于事无补
  
。

Crying is of no avail now.