"tretivu" meaning in Faroese

{
  "head_templates": [
    {
      "args": {
        "1": "fo",
        "2": "numeral"
      },
      "expansion": "tretivu",
      "name": "head"
    }
  ],
  "lang": "Faroese",
  "lang_code": "fo",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Faroese cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Faroese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Faroese entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "thirty"
      ],
      "id": "en-tretivu-fo-num-rKX7Wdtp",
      "links": [
        [
          "thirty",
          "thirty"
        ]
      ],
      "synonyms": [
        {
          "word": "tríati"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈtrɛdːvʊ]"
    }
  ],
  "word": "tretivu"
}

{
  "head_templates": [
    {
      "args": {
        "1": "fo",
        "2": "numeral"
      },
      "expansion": "tretivu",
      "name": "head"
    }
  ],
  "lang": "Faroese",
  "lang_code": "fo",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Faroese cardinal numbers",
        "Faroese entries with incorrect language header",
        "Faroese entries with language name categories using raw markup",
        "Faroese lemmas",
        "Faroese numerals",
        "Faroese terms with IPA pronunciation"
      ],
      "glosses": [
        "thirty"
      ],
      "links": [
        [
          "thirty",
          "thirty"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈtrɛdːvʊ]"
    }
  ],
  "synonyms": [
    {
      "word": "tríati"
    }
  ],
  "word": "tretivu"
}