Correct

费力

/ fèilì /
Strokes

Definition

to expend a great deal of effort

Example

As a Verb

exert great effort

1
yòng
不用
fèi
费力
jiù
néng
举起
kuài
shítou
石头
  

It's no exertion to him to lift the stone.

2
Fèi
费力
zhàn
lai
起来

pull oneself to one's feet

As a Verb

be strenuous/exhausting/arduous/tough

3
Xiǎohào
小号
字体
dòu
lai
起来
hěn
fèi
费力
  

Small type is hard to read.

4
juéde
觉得
wǎngqiú
网球
tài
fèi
费力
  

He finds tennis too physically demanding.

5
Fèi
费力
de
gōngzuò
工作

arduous/laborious/onerous task; up-hill job