言而無信 [－－无－]

Jyutping jin4 ji4 mou4 seon3
Pinyin yán ér wú xìn

Definitions (CC-CEDICT)
  1. untrustworthy; not true to one's word
Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. phrase, idiomatic
    to fail to keep faith; to go back on one's word; to break one's promise
    (syn.) 言而不信
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）