信口开河 xìn kǒu kāi hé

DEFINITIONS

  1. to speak without thinking (idiom)
  2. to blurt sth out

CHARACTERS

信 xìn
HSK 3
trust, believe; letter
口 kǒu
HSK 3
mouth; open end; entrance, gate
开 kāi
HSK 1
open; initiate, begin, start
河 hé
HSK 3
river; stream; yellow river