言而無信 yán ér wú xìn

DEFINITIONS

  1. to go back on one's word
  2. to break one's promise
  3. to be unfaithful
  4. to be untrustworthy

CHARACTERS

言 yán words, speech; speak, say
而 ér and; and then; and yet; but
無 wú negative, no, not; lack, have no
信 xìn trust, believe; letter