"fjouer" meaning in North Frisian

{
  "etymology_templates": [
    {
      "args": {
        "1": "frr",
        "2": "ofs",
        "3": "fiūwer"
      },
      "expansion": "Old Frisian fiūwer",
      "name": "der"
    },
    {
      "args": {
        "1": "fy",
        "2": "fjouwer"
      },
      "expansion": "West Frisian fjouwer",
      "name": "cog"
    }
  ],
  "etymology_text": "From Old Frisian fiūwer. Compare West Frisian fjouwer.",
  "head_templates": [
    {
      "args": {
        "1": "frr",
        "2": "numeral"
      },
      "expansion": "fjouer",
      "name": "head"
    }
  ],
  "lang": "North Frisian",
  "lang_code": "frr",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Mooring North Frisian",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "North Frisian cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "North Frisian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "four"
      ],
      "id": "en-fjouer-frr-num-BO-vCA9a",
      "links": [
        [
          "four",
          "four"
        ]
      ],
      "raw_glosses": [
        "(Mooring) four"
      ],
      "tags": [
        "Mooring"
      ]
    }
  ],
  "word": "fjouer"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "frr",
        "2": "ofs",
        "3": "fiūwer"
      },
      "expansion": "Old Frisian fiūwer",
      "name": "der"
    },
    {
      "args": {
        "1": "fy",
        "2": "fjouwer"
      },
      "expansion": "West Frisian fjouwer",
      "name": "cog"
    }
  ],
  "etymology_text": "From Old Frisian fiūwer. Compare West Frisian fjouwer.",
  "head_templates": [
    {
      "args": {
        "1": "frr",
        "2": "numeral"
      },
      "expansion": "fjouer",
      "name": "head"
    }
  ],
  "lang": "North Frisian",
  "lang_code": "frr",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Mooring North Frisian",
        "North Frisian cardinal numbers",
        "North Frisian entries with incorrect language header",
        "North Frisian lemmas",
        "North Frisian numerals",
        "North Frisian terms derived from Old Frisian"
      ],
      "glosses": [
        "four"
      ],
      "links": [
        [
          "four",
          "four"
        ]
      ],
      "raw_glosses": [
        "(Mooring) four"
      ],
      "tags": [
        "Mooring"
      ]
    }
  ],
  "word": "fjouer"
}