"一言既に出ずれば駟馬も追い難し" meaning in Japanese

{
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        "2": "lzh",
        "3": "-"
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      "expansion": "Calque from Literary Chinese",
      "name": "cal"
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    {
      "args": {
        "1": "一言既出，駟馬難追",
        "tr": "-"
      },
      "expansion": "一言既出，駟馬難追／一言既出，驷马难追",
      "name": "zh-l"
    }
  ],
  "etymology_text": "Calque from Literary Chinese 一言既出，駟馬難追／一言既出，驷马难追.",
  "forms": [
    {
      "form": "一言既に出ずれば駟馬も追い難し",
      "ruby": [
        [
          "一",
          "いち"
        ],
        [
          "言",
          "ごん"
        ],
        [
          "既",
          "すで"
        ],
        [
          "出",
          "い"
        ],
        [
          "駟",
          "し"
        ],
        [
          "馬",
          "ば"
        ],
        [
          "追",
          "お"
        ],
        [
          "難",
          "がた"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ichigon sude ni izureba shiba mo oi gatashi",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "いちごん すで に いずれば しば も おい がたし"
      },
      "expansion": "一(いち)言(ごん)既(すで)に出(い)ずれば駟(し)馬(ば)も追(お)い難(がた)し • (ichigon sude ni izureba shiba mo oi gatashi)",
      "name": "ja-phrase"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "proverb",
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          "kind": "other",
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          "kind": "other",
          "name": "Japanese terms with 8 kanji",
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      ],
      "glosses": [
        "a word once spoken is hard to catch even with a four-horse carriage; a word once spoken cannot be undone"
      ],
      "id": "en-一言既に出ずれば駟馬も追い難し-ja-proverb-5~6ChqF~"
    }
  ],
  "word": "一言既に出ずれば駟馬も追い難し"
}

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    },
    {
      "args": {
        "1": "一言既出，駟馬難追",
        "tr": "-"
      },
      "expansion": "一言既出，駟馬難追／一言既出，驷马难追",
      "name": "zh-l"
    }
  ],
  "etymology_text": "Calque from Literary Chinese 一言既出，駟馬難追／一言既出，驷马难追.",
  "forms": [
    {
      "form": "一言既に出ずれば駟馬も追い難し",
      "ruby": [
        [
          "一",
          "いち"
        ],
        [
          "言",
          "ごん"
        ],
        [
          "既",
          "すで"
        ],
        [
          "出",
          "い"
        ],
        [
          "駟",
          "し"
        ],
        [
          "馬",
          "ば"
        ],
        [
          "追",
          "お"
        ],
        [
          "難",
          "がた"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ichigon sude ni izureba shiba mo oi gatashi",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "いちごん すで に いずれば しば も おい がたし"
      },
      "expansion": "一(いち)言(ごん)既(すで)に出(い)ずれば駟(し)馬(ば)も追(お)い難(がた)し • (ichigon sude ni izureba shiba mo oi gatashi)",
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        "Japanese terms spelled with first grade kanji",
        "Japanese terms spelled with hyōgai kanji",
        "Japanese terms spelled with second grade kanji",
        "Japanese terms spelled with secondary school kanji",
        "Japanese terms spelled with sixth grade kanji",
        "Japanese terms spelled with third grade kanji",
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  "word": "一言既に出ずれば駟馬も追い難し"
}

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  "path": [
    "一言既に出ずれば駟馬も追い難し"
  ],
  "section": "Japanese",
  "subsection": "proverb",
  "title": "一言既に出ずれば駟馬も追い難し",
  "trace": ""
}