苦功

kǔgōng
  1. hard work
  2. laborious effort
  3. painstaking work

CEDICT

hard work; painstaking effort

Wiktionary

辛勞刻苦的功夫。

重編國語辭典

Entry Composition

1 苦 kǔ
  1. bitter
  2. hardship
  3. pain
  4. to suffer
  5. to bring suffering to
  6. painstakingly
2 功 gōng
  1. meritorious deed or service
  2. achievement
  3. result
  4. service
  5. accomplishment
  6. work (physics)

Related entries

勞苦 láokǔ
  1. to toil
  2. hard work
苦勞 kǔláo
  1. toil
  2. hard work
苦練 kǔliàn
  1. to train hard
  2. to practice diligently
  3. hard work
  4. blood, sweat, and tears