Correct

枉自

/ wǎng zì /
Strokes

Example

As an Adverb

vainly; fruitlessly; futilely

1
xiǎng
ràng
men
他们
rènzhēn
认真
tīng
què
的确
shì
wǎng
fèi
自费力
  

He tried vainly/in vain to make them listen attentively. / It was a vain attempt for him to make them listen attentively.

2
Wǎng
kāi
le
me
那么
duō
多次
huì
  
,
dàn
háishi
还是
háo
毫无
jiēguǒ
结果
  

We have had quite a few meetings, but to no purpose.