沉淪

沉沦
chénlún
  1. to sink into (vice, depravity etc)
  2. to pass into oblivion
  3. downfall; passing

CEDICT

to sink into; to fall into (vice, depravity, degradation, etc.)

Wiktionary

  1. 沉沒，沒入水中。
  2. 零落、淪落。
  3. 沉溺。
  4. 隱沒不遇的賢士。

重編國語辭典

Entry Composition

=1 沉 chén variant of 沉 chén
=1 沉 chén
  1. to submerge
  2. to immerse
  3. to sink
  4. to keep down
  5. to lower
  6. to drop
  7. deep
  8. profound
  9. heavy
2 淪 lún
  1. to sink (into ruin, oblivion)
  2. to be reduced to

Related entries

陷入 xiànrù
  1. to sink into
  2. to get caught up in
  3. to land in (a predicament)
你在陷入困境。

You're getting into deep water.

Source: Tatoeba

湮沒無聞 yānmòwúwén to pass into oblivion
湮沒 yānmò
  1. to bury
  2. to submerge
  3. to pass into oblivion
  4. to obliterate
  5. to annihilate (physics)