"不老" meaning in Japanese

{
  "forms": [
    {
      "form": "不老",
      "ruby": [
        [
          "不",
          "ふ"
        ],
        [
          "老",
          "ろう"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "furō",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "furau",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "ふらう",
      "roman": "furau",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ふろう",
        "hhira": "ふらう"
      },
      "expansion": "不(ふ)老(ろう) • (furō) ^(←ふらう (furau)?)",
      "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 alt parameters",
          "parents": [
            "Links with redundant alt parameters",
            "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 2 kanji",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "english": "eternal youth and longevity",
          "roman": "furōchōju",
          "ruby": [
            [
              "不老長寿",
              "ふろうちょうじゅ"
            ]
          ],
          "word": "不老長寿"
        },
        {
          "english": "eternal youth and immortality",
          "roman": "furōfushi",
          "ruby": [
            [
              "不老不死",
              "ふろうふし"
            ]
          ],
          "word": "不老不死"
        },
        {
          "roman": "furōmon",
          "ruby": [
            [
              "不老門",
              "ふろうもん"
            ]
          ],
          "word": "不老門"
        }
      ],
      "glosses": [
        "eternal youth"
      ],
      "id": "en-不老-ja-noun-j~ZR8S8r",
      "links": [
        [
          "eternal",
          "eternal"
        ],
        [
          "youth",
          "youth"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "other": "ふろー"
    },
    {
      "ipa": "[ɸɯ̟ɾo̞ː]"
    }
  ],
  "word": "不老"
}

{
  "derived": [
    {
      "english": "eternal youth and longevity",
      "roman": "furōchōju",
      "ruby": [
        [
          "不老長寿",
          "ふろうちょうじゅ"
        ]
      ],
      "word": "不老長寿"
    },
    {
      "english": "eternal youth and immortality",
      "roman": "furōfushi",
      "ruby": [
        [
          "不老不死",
          "ふろうふし"
        ]
      ],
      "word": "不老不死"
    },
    {
      "roman": "furōmon",
      "ruby": [
        [
          "不老門",
          "ふろうもん"
        ]
      ],
      "word": "不老門"
    }
  ],
  "forms": [
    {
      "form": "不老",
      "ruby": [
        [
          "不",
          "ふ"
        ],
        [
          "老",
          "ろう"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "furō",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "furau",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "ふらう",
      "roman": "furau",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ふろう",
        "hhira": "ふらう"
      },
      "expansion": "不(ふ)老(ろう) • (furō) ^(←ふらう (furau)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant alt parameters",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms spelled with fourth grade kanji",
        "Japanese terms with 2 kanji",
        "Japanese terms with IPA pronunciation",
        "Japanese terms with redundant sortkeys",
        "Pages with 3 entries",
        "Pages with entries"
      ],
      "glosses": [
        "eternal youth"
      ],
      "links": [
        [
          "eternal",
          "eternal"
        ],
        [
          "youth",
          "youth"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "other": "ふろー"
    },
    {
      "ipa": "[ɸɯ̟ɾo̞ː]"
    }
  ],
  "word": "不老"
}

{
  "called_from": "parser/304",
  "msg": "HTML tag <span> not properly closed",
  "path": [
    "不老"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "不老",
  "trace": "started on line 2, detected on line 2"
}

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