苦海茫茫

kǔhǎimángmáng
sea of bitterness is vast (idiom)

CEDICT

Entry Composition

1 苦海 kǔhǎi
  1. lit. sea of bitterness
  2. abyss of worldly suffering (Buddhist term)
  3. depths of misery
2 茫茫 mángmáng
  1. boundless
  2. vast and obscure