守口如瓶 shǒu kǒu rú píng

DEFINITIONS

  1. lit. to guard one's mouth like a closed bottle (idiom); tight-lipped
  2. reticent
  3. not breathing a word

CHARACTERS

守 shǒu defend, protect, guard, conserve
口 kǒu mouth; open end; entrance, gate
如 rú if, supposing; as if; like, as
瓶 píng jug, pitcher, vase, jar, bottle