"þrjátíu og níu" meaning in Icelandic

{
  "etymology_templates": [
    {
      "args": {
        "1": "thirty and nine"
      },
      "expansion": "“thirty and nine”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "thirty and nine"
      },
      "expansion": "Literally, “thirty and nine”",
      "name": "lit"
    }
  ],
  "etymology_text": "Literally, “thirty and nine”.",
  "head_templates": [
    {
      "args": {
        "1": "indecl",
        "pos": "numeral"
      },
      "expansion": "þrjátíu og níu (indeclinable)",
      "name": "is-adj"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Icelandic cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Icelandic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "thirty-nine"
      ],
      "id": "en-þrjátíu_og_níu-is-num-wZ5rGPdU",
      "links": [
        [
          "thirty-nine",
          "thirty-nine"
        ]
      ],
      "tags": [
        "indeclinable"
      ]
    }
  ],
  "word": "þrjátíu og níu"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "thirty and nine"
      },
      "expansion": "“thirty and nine”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "thirty and nine"
      },
      "expansion": "Literally, “thirty and nine”",
      "name": "lit"
    }
  ],
  "etymology_text": "Literally, “thirty and nine”.",
  "head_templates": [
    {
      "args": {
        "1": "indecl",
        "pos": "numeral"
      },
      "expansion": "þrjátíu og níu (indeclinable)",
      "name": "is-adj"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Icelandic cardinal numbers",
        "Icelandic entries with incorrect language header",
        "Icelandic indeclinable numerals",
        "Icelandic lemmas",
        "Icelandic multiword terms",
        "Icelandic numerals",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "thirty-nine"
      ],
      "links": [
        [
          "thirty-nine",
          "thirty-nine"
        ]
      ],
      "tags": [
        "indeclinable"
      ]
    }
  ],
  "word": "þrjátíu og níu"
}