"simplicísimos" meaning in Spanish

{
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "adjective form",
        "g": "m-p"
      },
      "expansion": "simplicísimos m pl",
      "name": "head"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "simplicísimo"
        }
      ],
      "glosses": [
        "masculine plural of simplicísimo"
      ],
      "id": "en-simplicísimos-es-adj-kN7dWhuP",
      "links": [
        [
          "simplicísimo",
          "simplicísimo#Spanish"
        ]
      ],
      "tags": [
        "form-of",
        "masculine",
        "plural"
      ]
    }
  ],
  "word": "simplicísimos"
}

{
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "adjective form",
        "g": "m-p"
      },
      "expansion": "simplicísimos m pl",
      "name": "head"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Spanish adjective forms",
        "Spanish entries with incorrect language header",
        "Spanish non-lemma forms"
      ],
      "form_of": [
        {
          "word": "simplicísimo"
        }
      ],
      "glosses": [
        "masculine plural of simplicísimo"
      ],
      "links": [
        [
          "simplicísimo",
          "simplicísimo#Spanish"
        ]
      ],
      "tags": [
        "form-of",
        "masculine",
        "plural"
      ]
    }
  ],
  "word": "simplicísimos"
}