"impossiblest" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "superlative adjective"
      },
      "expansion": "impossiblest",
      "name": "head"
    }
  ],
  "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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1851, Thomas Carlyle, The Life of John Sterling, London: Chapman and Hall, […], →OCLC:",
          "text": "We must stick by it, however; — of all enterprises the impossiblest is that of getting out of it, and shifting into another.",
          "type": "quote"
        }
      ],
      "form_of": [
        {
          "extra": "most impossible",
          "word": "impossible"
        }
      ],
      "glosses": [
        "superlative form of impossible: most impossible"
      ],
      "id": "en-impossiblest-en-adj--oyljcXJ",
      "links": [
        [
          "impossible",
          "impossible#English"
        ]
      ],
      "tags": [
        "form-of",
        "superlative"
      ]
    }
  ],
  "word": "impossiblest"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "superlative adjective"
      },
      "expansion": "impossiblest",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English non-lemma forms",
        "English superlative adjectives",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1851, Thomas Carlyle, The Life of John Sterling, London: Chapman and Hall, […], →OCLC:",
          "text": "We must stick by it, however; — of all enterprises the impossiblest is that of getting out of it, and shifting into another.",
          "type": "quote"
        }
      ],
      "form_of": [
        {
          "extra": "most impossible",
          "word": "impossible"
        }
      ],
      "glosses": [
        "superlative form of impossible: most impossible"
      ],
      "links": [
        [
          "impossible",
          "impossible#English"
        ]
      ],
      "tags": [
        "form-of",
        "superlative"
      ]
    }
  ],
  "word": "impossiblest"
}