Correct
苦干
/ kǔgàn /
Strokes
Definition
to work hard
Example
As a Verb
work like a horse; work hard; make painstaking efforts
1
Kǔgàn
苦干
jīngshén
精神
spirit of hard work
2
Kǔgànjiā
苦干加
qiǎogàn
巧干
work hard and skilfully; combine hard work with ingenuity
3
Máitóukǔgàn
埋头苦干
labour at/on a task