點水不漏

点水不漏
diǎnshuǐbùlòu
  1. not one drop of water leaks (idiom); fig. thoughtful and completely rigorous
  2. watertight

CEDICT

比喻周密。

重編國語辭典

Entry Composition

1 點水 diǎnshuǐ
  1. to skim
  2. lightly touching the water (as the dragonfly in the idiom 蜻蜓點水)
  3. skin-deep
2 不 bù
  1. no; not so
  2. (bound form) not; un-
3 漏 lòu
  1. to leak
  2. to divulge
  3. to leave out by mistake
  4. waterclock or hourglass (old)

Related entries

不透水 bùtòushuǐ
  1. waterproof
  2. watertight
  3. impermeable
滴水不漏 dīshuǐbùlòu
  1. lit. not one drop of water can leak out
  2. watertight
  3. rigorous (argument)