"pierre dure" meaning in Français

{
  "antonyms": [
    {
      "word": "pierre tendre"
    }
  ],
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions nominales en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en allemand",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Français",
      "orig": "français",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de pierre et de dur."
  ],
  "forms": [
    {
      "form": "pierres dures",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en français de la minéralogie",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Pierre dont le poids du pied cube est d'environ 155 livres."
      ],
      "id": "fr-pierre_dure-fr-noun-Dq3BnZGk",
      "topics": [
        "mineralogy"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\pjɛʁ dyʁ\\"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Allemand",
      "lang_code": "de",
      "word": "Pietra dura"
    },
    {
      "lang": "Anglais",
      "lang_code": "en",
      "word": "pietra dura"
    },
    {
      "lang": "Italien",
      "lang_code": "it",
      "word": "pietra dura"
    }
  ],
  "word": "pierre dure"
}

{
  "antonyms": [
    {
      "word": "pierre tendre"
    }
  ],
  "categories": [
    "Compositions en français",
    "Locutions nominales en français",
    "Traductions en allemand",
    "Traductions en anglais",
    "Traductions en italien",
    "français"
  ],
  "etymology_texts": [
    "Composé de pierre et de dur."
  ],
  "forms": [
    {
      "form": "pierres dures",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        "Lexique en français de la minéralogie"
      ],
      "glosses": [
        "Pierre dont le poids du pied cube est d'environ 155 livres."
      ],
      "topics": [
        "mineralogy"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\pjɛʁ dyʁ\\"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Allemand",
      "lang_code": "de",
      "word": "Pietra dura"
    },
    {
      "lang": "Anglais",
      "lang_code": "en",
      "word": "pietra dura"
    },
    {
      "lang": "Italien",
      "lang_code": "it",
      "word": "pietra dura"
    }
  ],
  "word": "pierre dure"
}