"skälv" meaning in Swedish

{
  "head_templates": [
    {
      "args": {
        "1": "sv",
        "2": "verb form"
      },
      "expansion": "skälv",
      "name": "head"
    }
  ],
  "lang": "Swedish",
  "lang_code": "sv",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Swedish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "skälva"
        }
      ],
      "glosses": [
        "imperative of skälva"
      ],
      "id": "en-skälv-sv-verb-qV4eNxDb",
      "links": [
        [
          "skälva",
          "skälva#Swedish"
        ]
      ],
      "tags": [
        "form-of",
        "imperative"
      ]
    }
  ],
  "sounds": [
    {
      "homophone": "själv"
    }
  ],
  "word": "skälv"
}

{
  "head_templates": [
    {
      "args": {
        "1": "sv",
        "2": "verb form"
      },
      "expansion": "skälv",
      "name": "head"
    }
  ],
  "lang": "Swedish",
  "lang_code": "sv",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Swedish entries with incorrect language header",
        "Swedish non-lemma forms",
        "Swedish terms with homophones",
        "Swedish verb forms"
      ],
      "form_of": [
        {
          "word": "skälva"
        }
      ],
      "glosses": [
        "imperative of skälva"
      ],
      "links": [
        [
          "skälva",
          "skälva#Swedish"
        ]
      ],
      "tags": [
        "form-of",
        "imperative"
      ]
    }
  ],
  "sounds": [
    {
      "homophone": "själv"
    }
  ],
  "word": "skälv"
}