"stone-hard" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "enm",
        "3": "ston-hard"
      },
      "expansion": "Middle English ston-hard",
      "name": "inh"
    },
    {
      "args": {
        "1": "en",
        "2": "ang",
        "3": "*stānheard"
      },
      "expansion": "Old English *stānheard",
      "name": "inh"
    },
    {
      "args": {
        "1": "en",
        "2": "stone",
        "3": "hard"
      },
      "expansion": "stone + hard",
      "name": "compound"
    }
  ],
  "etymology_text": "From Middle English ston-hard, ston-harde, from Old English *stānheard (attested in names: stanhard,\nstanart, stannard, etc.), equivalent to stone + hard.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "stone-hard (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "stonehard"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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          "kind": "other",
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          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of stonehard"
      ],
      "id": "en-stone-hard-en-adj-tTJBxJFq",
      "links": [
        [
          "stonehard",
          "stonehard#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "not-comparable"
      ]
    }
  ],
  "word": "stone-hard"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "enm",
        "3": "ston-hard"
      },
      "expansion": "Middle English ston-hard",
      "name": "inh"
    },
    {
      "args": {
        "1": "en",
        "2": "ang",
        "3": "*stānheard"
      },
      "expansion": "Old English *stānheard",
      "name": "inh"
    },
    {
      "args": {
        "1": "en",
        "2": "stone",
        "3": "hard"
      },
      "expansion": "stone + hard",
      "name": "compound"
    }
  ],
  "etymology_text": "From Middle English ston-hard, ston-harde, from Old English *stānheard (attested in names: stanhard,\nstanart, stannard, etc.), equivalent to stone + hard.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "stone-hard (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "stonehard"
        }
      ],
      "categories": [
        "English adjectives",
        "English compound terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms derived from Middle English",
        "English terms derived from Old English",
        "English terms inherited from Middle English",
        "English terms inherited from Old English",
        "English uncomparable adjectives",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "Alternative form of stonehard"
      ],
      "links": [
        [
          "stonehard",
          "stonehard#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
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  ],
  "word": "stone-hard"
}