水落石出

shuǐluòshíchū
  1. lit. as the water recedes, the rocks appear (idiom)
  2. fig. the truth comes to light

CEDICT

Entry Composition

1 水 shuǐ
  1. water
  2. (after a name) ... River
  3. to swim (used mostly in 會水 huìshuǐ and 水性 shuǐxìng)
  4. (coll.) lacking in substance; shoddy
  5. (bound form) additional cost; extra income
  6. classifier for washings of a garment
2 落石 luòshí falling stone
=3 出 chū
  1. to go out; to come out
  2. to arise; to occur
  3. to produce; to yield
  4. to go beyond; to exceed
  5. (used after a verb to indicate an outward direction or a positive result)
  6. classifier for dramas, plays, operas etc
=3 出 chū variant of 出 chū (classifier for plays or chapters of classical novels)