苦功

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

CEDICT

hard work; painstaking effort

Wiktionary

辛劳刻苦的功夫。

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

劳苦 láokǔ
  1. to toil
  2. hard work
苦劳 kǔláo
  1. toil
  2. hard work
苦练 kǔliàn
  1. to train hard
  2. to practice diligently
  3. hard work
  4. blood, sweat, and tears