"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": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant alt parameters",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms read with on'yomi",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with 2 kanji",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with Heiban pitch accent (Tōkyō)",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with non-redundant non-automated sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [],
          "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"
            ]
          ],
          "translation": "eternal youth and longevity",
          "word": "不老長寿"
        },
        {
          "english": "eternal youth and immortality",
          "roman": "furōfushi",
          "ruby": [
            [
              "不老不死",
              "ふろうふし"
            ]
          ],
          "translation": "eternal youth and immortality",
          "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"
        ]
      ],
      "translation": "eternal youth and longevity",
      "word": "不老長寿"
    },
    {
      "english": "eternal youth and immortality",
      "roman": "furōfushi",
      "ruby": [
        [
          "不老不死",
          "ふろうふし"
        ]
      ],
      "translation": "eternal youth and immortality",
      "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 read with on'yomi",
        "Japanese terms spelled with fourth grade kanji",
        "Japanese terms spelled with 不 read as ふ",
        "Japanese terms spelled with 老 read as ろう",
        "Japanese terms with 2 kanji",
        "Japanese terms with Heiban pitch accent (Tōkyō)",
        "Japanese terms with IPA pronunciation",
        "Japanese terms with IPA pronunciation with pitch accent",
        "Japanese terms with non-redundant non-automated sortkeys",
        "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"
}