"brainsick" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "brain",
        "3": "sick"
      },
      "expansion": "brain + sick",
      "name": "compound"
    }
  ],
  "etymology_text": "brain + sick",
  "forms": [
    {
      "form": "more brainsick",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most brainsick",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "brainsick (comparative more brainsick, superlative most brainsick)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "brainsickly"
        },
        {
          "word": "brainsickness"
        }
      ],
      "glosses": [
        "Disordered in the understanding; giddy; thoughtless."
      ],
      "id": "en-brainsick-en-adj-0YXS2xmv",
      "links": [
        [
          "Disordered",
          "disordered"
        ],
        [
          "understanding",
          "understanding"
        ],
        [
          "giddy",
          "giddy"
        ],
        [
          "thoughtless",
          "thoughtless"
        ]
      ]
    }
  ],
  "word": "brainsick"
}

{
  "derived": [
    {
      "word": "brainsickly"
    },
    {
      "word": "brainsickness"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "brain",
        "3": "sick"
      },
      "expansion": "brain + sick",
      "name": "compound"
    }
  ],
  "etymology_text": "brain + sick",
  "forms": [
    {
      "form": "more brainsick",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most brainsick",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "brainsick (comparative more brainsick, superlative most brainsick)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English compound terms",
        "English entries with incorrect language header",
        "English lemmas"
      ],
      "glosses": [
        "Disordered in the understanding; giddy; thoughtless."
      ],
      "links": [
        [
          "Disordered",
          "disordered"
        ],
        [
          "understanding",
          "understanding"
        ],
        [
          "giddy",
          "giddy"
        ],
        [
          "thoughtless",
          "thoughtless"
        ]
      ]
    }
  ],
  "word": "brainsick"
}