一言既出，駟馬難追 [－－－－－驷马难－]

Jyutping jat1 jin4 gei3 ceot1 ， si3 maa5 naan4 zeoi1
Pinyin yī yán jì chū ， sì mǎ nán zhuī

Definitions (Wiktionary)
  1. phrase, idiomatic
    A word once spoken cannot be taken back; A promise must be kept

一言既出，駟馬難追 [－－－－－驷马难－]

Jyutping jat1 jin4 gei3 ceot1 si3 maa5 naan4 zeoi1
Pinyin yī yán jì chū ， sì mǎ nán zhuī

Definitions (粵典–words.hk)
  1. 語句
    講​過​嘅​説​話​就要​算數
    "Keep your word"; "I have your word"; a promise must be kept

一言既出，駟馬難追 [－－－－－驷马难－]

Jyutping jat1 jin4 gei3 ceot1 , si3 maa5 naan4 zeoi1
Pinyin yī yán jì chū , sì mǎ nán zhuī

Definitions (CC-CEDICT)
  1. lit. once said, a team of horses cannot unsay it (idiom); a promise must be kept
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    一言既出，驷马难追。
    一言既出，駟馬難追。
    yī yán jì chū ， sì mǎ nán zhuī 。
    • You cannot take back what you have said.