"grano duro" meaning in Italian

{
  "forms": [
    {
      "form": "grani duri",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "grano duro m (plural grani duri)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "antonyms": [
        {
          "word": "grano tenero"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "it",
          "name": "Grains",
          "orig": "it:Grains",
          "parents": [
            "Foods",
            "Grasses",
            "Eating",
            "Food and drink",
            "Commelinids",
            "Human behaviour",
            "All topics",
            "Plants",
            "Human",
            "Fundamental",
            "Lifeforms",
            "Life",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "durum, durum wheat"
      ],
      "id": "en-grano_duro-it-noun-AOFBaVy9",
      "links": [
        [
          "durum",
          "durum"
        ],
        [
          "durum wheat",
          "durum wheat"
        ]
      ],
      "qualifier": "grain",
      "raw_glosses": [
        "(grain) durum, durum wheat"
      ],
      "tags": [
        "masculine"
      ],
      "wikipedia": [
        "it:grano duro"
      ]
    }
  ],
  "word": "grano duro"
}

{
  "forms": [
    {
      "form": "grani duri",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "grano duro m (plural grani duri)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "antonyms": [
        {
          "word": "grano tenero"
        }
      ],
      "categories": [
        "Italian countable nouns",
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian masculine nouns",
        "Italian multiword terms",
        "Italian nouns",
        "it:Grains"
      ],
      "glosses": [
        "durum, durum wheat"
      ],
      "links": [
        [
          "durum",
          "durum"
        ],
        [
          "durum wheat",
          "durum wheat"
        ]
      ],
      "qualifier": "grain",
      "raw_glosses": [
        "(grain) durum, durum wheat"
      ],
      "tags": [
        "masculine"
      ],
      "wikipedia": [
        "it:grano duro"
      ]
    }
  ],
  "word": "grano duro"
}