"åtti" meaning in Norwegian Nynorsk

{
  "etymology_templates": [
    {
      "args": {
        "1": "nn",
        "2": "non",
        "3": "áttatigi"
      },
      "expansion": "Old Norse áttatigi",
      "name": "der"
    },
    {
      "args": {
        "1": "non",
        "2": "áttatíu"
      },
      "expansion": "áttatíu",
      "name": "m"
    }
  ],
  "etymology_text": "From Old Norse áttatigi, áttatíu.",
  "head_templates": [
    {
      "args": {
        "1": "nn",
        "2": "numeral"
      },
      "expansion": "åtti",
      "name": "head"
    }
  ],
  "lang": "Norwegian Nynorsk",
  "lang_code": "nn",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Norwegian Nynorsk cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Norwegian Nynorsk entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "eighty"
      ],
      "id": "en-åtti-nn-num-Dbw0B6cI",
      "links": [
        [
          "eighty",
          "eighty#English"
        ]
      ],
      "related": [
        {
          "word": "åttiande"
        }
      ]
    }
  ],
  "word": "åtti"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "nn",
        "2": "non",
        "3": "áttatigi"
      },
      "expansion": "Old Norse áttatigi",
      "name": "der"
    },
    {
      "args": {
        "1": "non",
        "2": "áttatíu"
      },
      "expansion": "áttatíu",
      "name": "m"
    }
  ],
  "etymology_text": "From Old Norse áttatigi, áttatíu.",
  "head_templates": [
    {
      "args": {
        "1": "nn",
        "2": "numeral"
      },
      "expansion": "åtti",
      "name": "head"
    }
  ],
  "lang": "Norwegian Nynorsk",
  "lang_code": "nn",
  "pos": "num",
  "related": [
    {
      "word": "åttiande"
    }
  ],
  "senses": [
    {
      "categories": [
        "Norwegian Nynorsk cardinal numbers",
        "Norwegian Nynorsk entries with incorrect language header",
        "Norwegian Nynorsk lemmas",
        "Norwegian Nynorsk numerals",
        "Norwegian Nynorsk terms derived from Old Norse"
      ],
      "glosses": [
        "eighty"
      ],
      "links": [
        [
          "eighty",
          "eighty#English"
        ]
      ]
    }
  ],
  "word": "åtti"
}