"impregnable" meaning in English

{
  "forms": [
    {
      "form": "impregnable",
      "tags": [
        "positive"
      ]
    },
    {
      "form": "more impregnable",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most impregnable",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "more": "true"
      },
      "expansion": "[POS TABLE]",
      "name": "adj"
    }
  ],
  "hyphenation": "im‧preg‧na‧ble",
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "examples": [
        {
          "text": "The Welsh found that Edward's castles were impregnable."
        },
        {
          "text": "The Macedonian phalanx was impregnable from the front."
        },
        {
          "text": "The grandmaster's position was quite impregnable."
        }
      ],
      "glosses": [
        "When something is impregnable, it cannot be beaten. Used in contexts of physical force, but in metaphor, for any situation where a position or person cannot be defeated."
      ],
      "id": "simple-impregnable-en-adj-O6uLqnG2"
    }
  ],
  "sounds": [
    {
      "ipa": "/ɪmˈprɛɡnəbəl/"
    },
    {
      "audio": "LL-Q1860 (eng)-Vealhurl-impregnable.wav",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "impregnable"
}

{
  "forms": [
    {
      "form": "impregnable",
      "tags": [
        "positive"
      ]
    },
    {
      "form": "more impregnable",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most impregnable",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "more": "true"
      },
      "expansion": "[POS TABLE]",
      "name": "adj"
    }
  ],
  "hyphenation": "im‧preg‧na‧ble",
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "examples": [
        {
          "text": "The Welsh found that Edward's castles were impregnable."
        },
        {
          "text": "The Macedonian phalanx was impregnable from the front."
        },
        {
          "text": "The grandmaster's position was quite impregnable."
        }
      ],
      "glosses": [
        "When something is impregnable, it cannot be beaten. Used in contexts of physical force, but in metaphor, for any situation where a position or person cannot be defeated."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɪmˈprɛɡnəbəl/"
    },
    {
      "audio": "LL-Q1860 (eng)-Vealhurl-impregnable.wav",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "impregnable"
}