"θυέλλης" meaning in Greek

{
  "forms": [
    {
      "form": "thyéllis",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "θύελλας",
      "roman": "thýellas",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "proper noun form",
        "g": "f"
      },
      "expansion": "θυέλλης • (thyéllis) f",
      "name": "head"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Greek entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "extra": "thýella",
          "word": "θύελλα"
        }
      ],
      "glosses": [
        "genitive singular of θύελλα (thýella)"
      ],
      "id": "en-θυέλλης-el-name-aZeyPbgN",
      "links": [
        [
          "θύελλα",
          "θύελλα#Greek"
        ]
      ],
      "raw_glosses": [
        "(formal, archaic) genitive singular of θύελλα (thýella)"
      ],
      "tags": [
        "archaic",
        "form-of",
        "formal",
        "genitive",
        "singular"
      ]
    }
  ],
  "word": "θυέλλης"
}

{
  "forms": [
    {
      "form": "thyéllis",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "θύελλας",
      "roman": "thýellas",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "proper noun form",
        "g": "f"
      },
      "expansion": "θυέλλης • (thyéllis) f",
      "name": "head"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "Greek entries with incorrect language header",
        "Greek formal terms",
        "Greek non-lemma forms",
        "Greek proper noun forms",
        "Greek terms with archaic senses",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "form_of": [
        {
          "extra": "thýella",
          "word": "θύελλα"
        }
      ],
      "glosses": [
        "genitive singular of θύελλα (thýella)"
      ],
      "links": [
        [
          "θύελλα",
          "θύελλα#Greek"
        ]
      ],
      "raw_glosses": [
        "(formal, archaic) genitive singular of θύελλα (thýella)"
      ],
      "tags": [
        "archaic",
        "form-of",
        "formal",
        "genitive",
        "singular"
      ]
    }
  ],
  "word": "θυέλλης"
}