苦思

kǔsī
  1. to think hard
  2. bitter thoughts
  3. to pour out one's sufferings

CEDICT

to think hard; to cudgel one's brains

Wiktionary

深思竭虑。

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 思 sī
  1. to think
  2. to consider

Containing this entry

劳心苦思 láoxīnkǔsī
  1. to rack one's brains
  2. to think hard
忆苦思甜 yìkǔsītián to view one's past as miserable and one's present as happy (idiom)
苦思冥想 kǔsīmíngxiǎng (idiom) to think deeply; to rack one's brains

Related entries

穷思苦想 qióngsīkǔxiǎng
  1. to think hard (idiom)
  2. to give sth much thought
劳心苦思 láoxīnkǔsī
  1. to rack one's brains
  2. to think hard
吐苦水 tǔkǔshuǐ
  1. to have bitter digestive fluids rising to the mouth
  2. fig. to complain bitterly
  3. to pour out one's sufferings