"胸先三寸" meaning in Japanese

{
  "forms": [
    {
      "form": "胸先三寸",
      "ruby": [
        [
          "胸",
          "むな"
        ],
        [
          "先",
          "さき"
        ],
        [
          "三",
          "さん"
        ],
        [
          "寸",
          "ずん"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "munasakisanzun",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "むなさきさんずん"
      },
      "expansion": "胸(むな)先(さき)三(さん)寸(ずん) • (munasakisanzun)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "one's mind; one's inner feelings; (a decision hinging on) how someone feels about it"
      ],
      "id": "en-胸先三寸-ja-noun-U75Iy7K1",
      "raw_glosses": [
        "(idiomatic) one's mind; one's inner feelings; (a decision hinging on) how someone feels about it"
      ],
      "related": [
        {
          "roman": "munesanzun",
          "ruby": [
            [
              "胸三寸",
              "むねさんずん"
            ]
          ],
          "word": "胸三寸"
        }
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "胸先三寸"
}

{
  "forms": [
    {
      "form": "胸先三寸",
      "ruby": [
        [
          "胸",
          "むな"
        ],
        [
          "先",
          "さき"
        ],
        [
          "三",
          "さん"
        ],
        [
          "寸",
          "ずん"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "munasakisanzun",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "むなさきさんずん"
      },
      "expansion": "胸(むな)先(さき)三(さん)寸(ずん) • (munasakisanzun)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "related": [
    {
      "roman": "munesanzun",
      "ruby": [
        [
          "胸三寸",
          "むねさんずん"
        ]
      ],
      "word": "胸三寸"
    }
  ],
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese idioms",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms spelled with first grade kanji",
        "Japanese terms spelled with sixth grade kanji",
        "Japanese terms with redundant sortkeys",
        "Japanese terms written with four Han script characters"
      ],
      "glosses": [
        "one's mind; one's inner feelings; (a decision hinging on) how someone feels about it"
      ],
      "raw_glosses": [
        "(idiomatic) one's mind; one's inner feelings; (a decision hinging on) how someone feels about it"
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "胸先三寸"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "胸先三寸"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "胸先三寸",
  "trace": ""
}