"sáran" meaning in Icelandic

{
  "etymology_text": "Compare the Old Norse sárr.",
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "adverb"
      },
      "expansion": "sáran",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Icelandic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "english": "to weep bitterly, to 'greit sore'",
          "urls": [
            "http://web.ff.cuni.cz/cgi-bin/uaa_slovnik/gmc_search_v3?cmd=viewthis&id=cv:b0212:42"
          ],
          "word": "gráta sáran"
        }
      ],
      "glosses": [
        "bitterly"
      ],
      "id": "en-sáran-is-adv-CYsbYm7c",
      "links": [
        [
          "bitterly",
          "bitterly"
        ]
      ]
    }
  ],
  "word": "sáran"
}

{
  "derived": [
    {
      "english": "to weep bitterly, to 'greit sore'",
      "urls": [
        "http://web.ff.cuni.cz/cgi-bin/uaa_slovnik/gmc_search_v3?cmd=viewthis&id=cv:b0212:42"
      ],
      "word": "gráta sáran"
    }
  ],
  "etymology_text": "Compare the Old Norse sárr.",
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "adverb"
      },
      "expansion": "sáran",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Icelandic adverbs",
        "Icelandic entries with incorrect language header",
        "Icelandic lemmas"
      ],
      "glosses": [
        "bitterly"
      ],
      "links": [
        [
          "bitterly",
          "bitterly"
        ]
      ]
    }
  ],
  "word": "sáran"
}