"bert" meaning in Icelandic

{
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "adjective form"
      },
      "expansion": "bert",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Icelandic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 4 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "1 7 34 1 2 8 11 5 5 26 0",
          "kind": "other",
          "name": "Pages with 4 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "1 5 28 1 2 10 13 3 3 34 0",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "form_of": [
        {
          "word": "ber"
        }
      ],
      "glosses": [
        "neuter nominative/accusative singular of ber"
      ],
      "id": "en-bert-is-adj-0bZqQVnm",
      "links": [
        [
          "ber",
          "ber#Icelandic"
        ]
      ],
      "tags": [
        "accusative",
        "form-of",
        "neuter",
        "nominative",
        "singular"
      ]
    }
  ],
  "word": "bert"
}

{
  "categories": [
    "Old Norse adjective forms",
    "Old Norse adverbs",
    "Old Norse entries with incorrect language header",
    "Old Norse lemmas",
    "Old Norse non-lemma forms",
    "Pages with 4 entries",
    "Pages with entries"
  ],
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "adjective form"
      },
      "expansion": "bert",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Icelandic adjective forms",
        "Icelandic entries with incorrect language header",
        "Icelandic non-lemma forms",
        "Pages with 4 entries",
        "Pages with entries"
      ],
      "form_of": [
        {
          "word": "ber"
        }
      ],
      "glosses": [
        "neuter nominative/accusative singular of ber"
      ],
      "links": [
        [
          "ber",
          "ber#Icelandic"
        ]
      ],
      "tags": [
        "accusative",
        "form-of",
        "neuter",
        "nominative",
        "singular"
      ]
    }
  ],
  "word": "bert"
}