"undescribably" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "undescribable",
        "3": "ly"
      },
      "expansion": "undescribable + -ly",
      "name": "suffix"
    }
  ],
  "etymology_text": "undescribable + -ly",
  "forms": [
    {
      "form": "more undescribably",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most undescribably",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "undescribably (comparative more undescribably, superlative most undescribably)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "alt_of": [
        {
          "word": "indescribably"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -ly",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of indescribably"
      ],
      "id": "en-undescribably-en-adv-Y3jeKHBa",
      "links": [
        [
          "indescribably",
          "indescribably#English"
        ]
      ],
      "related": [
        {
          "word": "undescribable"
        },
        {
          "word": "undescribableness"
        }
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "undescribably"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "undescribable",
        "3": "ly"
      },
      "expansion": "undescribable + -ly",
      "name": "suffix"
    }
  ],
  "etymology_text": "undescribable + -ly",
  "forms": [
    {
      "form": "more undescribably",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most undescribably",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "undescribably (comparative more undescribably, superlative most undescribably)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "related": [
    {
      "word": "undescribable"
    },
    {
      "word": "undescribableness"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "word": "indescribably"
        }
      ],
      "categories": [
        "English adverbs",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms suffixed with -ly"
      ],
      "glosses": [
        "Alternative form of indescribably"
      ],
      "links": [
        [
          "indescribably",
          "indescribably#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "undescribably"
}