"наян" meaning in Mongolian

{
  "forms": [
    {
      "form": "najan",
      "tags": [
        "romanization"
      ]
    }
  ],
  "hyphenation": [
    "на‧ян"
  ],
  "lang": "Mongolian",
  "lang_code": "mn",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Mongolian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Mongolian terms with redundant script codes",
          "parents": [
            "Terms with redundant script codes",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "the Eighty Years’ War",
          "roman": "Najan žiliin dajn",
          "text": "Наян жилийн дайн",
          "type": "example"
        }
      ],
      "form_of": [
        {
          "extra": "naja, “eighty”",
          "word": "ная"
        }
      ],
      "glosses": [
        "attributive form of ная (naja, “eighty”)"
      ],
      "id": "en-наян-mn-num-ZDw31N3i",
      "links": [
        [
          "ная",
          "ная#Mongolian"
        ]
      ],
      "tags": [
        "attributive",
        "form-of"
      ],
      "wikipedia": [
        "Mongolian script"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[nä.jɐ̆ɴ̟]"
    }
  ],
  "word": "наян"
}

{
  "forms": [
    {
      "form": "najan",
      "tags": [
        "romanization"
      ]
    }
  ],
  "hyphenation": [
    "на‧ян"
  ],
  "lang": "Mongolian",
  "lang_code": "mn",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Mongolian 2-syllable words",
        "Mongolian entries with incorrect language header",
        "Mongolian non-lemma forms",
        "Mongolian numeral forms",
        "Mongolian terms with redundant script codes",
        "Mongolian terms with usage examples",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "english": "the Eighty Years’ War",
          "roman": "Najan žiliin dajn",
          "text": "Наян жилийн дайн",
          "type": "example"
        }
      ],
      "form_of": [
        {
          "extra": "naja, “eighty”",
          "word": "ная"
        }
      ],
      "glosses": [
        "attributive form of ная (naja, “eighty”)"
      ],
      "links": [
        [
          "ная",
          "ная#Mongolian"
        ]
      ],
      "tags": [
        "attributive",
        "form-of"
      ],
      "wikipedia": [
        "Mongolian script"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[nä.jɐ̆ɴ̟]"
    }
  ],
  "word": "наян"
}