"hrökk" meaning in Icelandic

{
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "verb form"
      },
      "expansion": "hrökk",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "verb",
  "senses": [
    {
      "form_of": [
        {
          "word": "hrökkva"
        }
      ],
      "glosses": [
        "first/third-person singular past indicative active of hrökkva"
      ],
      "id": "en-hrökk-is-verb-pZnxWlA9",
      "links": [
        [
          "hrökkva",
          "hrökkva#Icelandic"
        ]
      ],
      "tags": [
        "active",
        "first-person",
        "form-of",
        "indicative",
        "past",
        "singular",
        "third-person"
      ]
    },
    {
      "categories": [
        {
          "_dis": "42 58",
          "kind": "other",
          "name": "Icelandic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "form_of": [
        {
          "word": "hrökkva"
        }
      ],
      "glosses": [
        "imperative second-person singular active of hrökkva"
      ],
      "id": "en-hrökk-is-verb-sTxe5mEq",
      "links": [
        [
          "hrökkva",
          "hrökkva#Icelandic"
        ]
      ],
      "tags": [
        "active",
        "form-of",
        "imperative",
        "second-person",
        "singular"
      ]
    }
  ],
  "word": "hrökk"
}

{
  "categories": [
    "Icelandic entries with incorrect language header",
    "Icelandic non-lemma forms",
    "Icelandic verb forms"
  ],
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "verb form"
      },
      "expansion": "hrökk",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "verb",
  "senses": [
    {
      "form_of": [
        {
          "word": "hrökkva"
        }
      ],
      "glosses": [
        "first/third-person singular past indicative active of hrökkva"
      ],
      "links": [
        [
          "hrökkva",
          "hrökkva#Icelandic"
        ]
      ],
      "tags": [
        "active",
        "first-person",
        "form-of",
        "indicative",
        "past",
        "singular",
        "third-person"
      ]
    },
    {
      "form_of": [
        {
          "word": "hrökkva"
        }
      ],
      "glosses": [
        "imperative second-person singular active of hrökkva"
      ],
      "links": [
        [
          "hrökkva",
          "hrökkva#Icelandic"
        ]
      ],
      "tags": [
        "active",
        "form-of",
        "imperative",
        "second-person",
        "singular"
      ]
    }
  ],
  "word": "hrökk"
}