原委

yuánwěi
the whole story

CEDICT

all the details; the whole story; how a thing happened from beginning to end

Wiktionary

事情的始末。

重編國語辭典

事情的始末；事情的所有细节

維基詞典

Entry Composition

1 原 yuán
  1. former
  2. original
  3. primary
  4. raw
  5. level
  6. cause
  7. source
2 委 wěi
  1. to entrust
  2. to cast aside
  3. to shift (blame etc)
  4. to accumulate
  5. roundabout
  6. winding
  7. dejected
  8. listless
  9. committee member
  10. council
  11. end
  12. actually
  13. certainly