"-ísimu" meaning in Asturian

{
  "head_templates": [
    {
      "args": {
        "1": "ast",
        "2": "suffix"
      },
      "expansion": "-ísimu",
      "name": "head"
    }
  ],
  "lang": "Asturian",
  "lang_code": "ast",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Asturian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "very beautiful",
          "text": "guapísimu",
          "type": "example"
        },
        {
          "english": "very long",
          "text": "llarguísimu",
          "type": "example"
        }
      ],
      "glosses": [
        "used to make superlatives of adjectives"
      ],
      "id": "en--ísimu-ast-suffix-mASf-m8h",
      "related": [
        {
          "word": "per-"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ísimu"
}

{
  "head_templates": [
    {
      "args": {
        "1": "ast",
        "2": "suffix"
      },
      "expansion": "-ísimu",
      "name": "head"
    }
  ],
  "lang": "Asturian",
  "lang_code": "ast",
  "pos": "suffix",
  "related": [
    {
      "word": "per-"
    }
  ],
  "senses": [
    {
      "categories": [
        "Asturian entries with incorrect language header",
        "Asturian lemmas",
        "Asturian suffixes",
        "Asturian terms with usage examples"
      ],
      "examples": [
        {
          "english": "very beautiful",
          "text": "guapísimu",
          "type": "example"
        },
        {
          "english": "very long",
          "text": "llarguísimu",
          "type": "example"
        }
      ],
      "glosses": [
        "used to make superlatives of adjectives"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ísimu"
}