"firs" meaning in Danish

{
  "etymology_templates": [
    {
      "args": {
        "1": "da",
        "2": "firsindstyve"
      },
      "expansion": "Clipping of firsindstyve",
      "name": "clipping"
    }
  ],
  "etymology_text": "Clipping of firsindstyve.",
  "head_templates": [
    {
      "args": {
        "1": "da",
        "2": "numeral"
      },
      "expansion": "firs",
      "name": "head"
    }
  ],
  "lang": "Danish",
  "lang_code": "da",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Danish cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Danish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "eighty"
      ],
      "id": "en-firs-da-num-Dbw0B6cI",
      "links": [
        [
          "eighty",
          "eighty#English"
        ]
      ],
      "related": [
        {
          "english": "eighties",
          "word": "firserne"
        },
        {
          "english": "eightieth",
          "word": "firsindstyvende"
        }
      ],
      "synonyms": [
        {
          "word": "firsindstyve"
        },
        {
          "word": "otti"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈfirˀs/"
    },
    {
      "ipa": "[ˈfiɐ̯ˀs]"
    }
  ],
  "word": "firs"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "da",
        "2": "firsindstyve"
      },
      "expansion": "Clipping of firsindstyve",
      "name": "clipping"
    }
  ],
  "etymology_text": "Clipping of firsindstyve.",
  "head_templates": [
    {
      "args": {
        "1": "da",
        "2": "numeral"
      },
      "expansion": "firs",
      "name": "head"
    }
  ],
  "lang": "Danish",
  "lang_code": "da",
  "pos": "num",
  "related": [
    {
      "english": "eighties",
      "word": "firserne"
    },
    {
      "english": "eightieth",
      "word": "firsindstyvende"
    }
  ],
  "senses": [
    {
      "categories": [
        "Danish cardinal numbers",
        "Danish clippings",
        "Danish entries with incorrect language header",
        "Danish lemmas",
        "Danish numerals",
        "Danish terms with IPA pronunciation"
      ],
      "glosses": [
        "eighty"
      ],
      "links": [
        [
          "eighty",
          "eighty#English"
        ]
      ],
      "synonyms": [
        {
          "word": "firsindstyve"
        },
        {
          "word": "otti"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈfirˀs/"
    },
    {
      "ipa": "[ˈfiɐ̯ˀs]"
    }
  ],
  "word": "firs"
}