"hierros" meaning in Spagnolo

{
  "categories": [
    {
      "kind": "other",
      "name": "Forme flesse sostantivali in spagnolo",
      "parents": [],
      "source": "w"
    }
  ],
  "hyphenations": [
    {
      "parts": [
        "hie",
        "rros"
      ]
    }
  ],
  "lang": "Spagnolo",
  "lang_code": "es",
  "pos": "noun",
  "pos_title": "Sostantivo, forma flessa",
  "senses": [
    {
      "form_of": [
        {
          "word": "manette"
        }
      ],
      "glosses": [
        "manette"
      ],
      "id": "it-hierros-es-noun-IaLgtH4N"
    },
    {
      "form_of": [
        {
          "word": "ceppi"
        }
      ],
      "glosses": [
        "ceppi"
      ],
      "id": "it-hierros-es-noun-Vj7ATxPL",
      "topics": [
        "heraldry"
      ]
    },
    {
      "form_of": [
        {
          "word": "hierro"
        }
      ],
      "glosses": [
        "plurale di hierro"
      ],
      "id": "it-hierros-es-noun-9lUTZJV2"
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈjeros/"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "hierros"
}

{
  "categories": [
    "Forme flesse sostantivali in spagnolo"
  ],
  "hyphenations": [
    {
      "parts": [
        "hie",
        "rros"
      ]
    }
  ],
  "lang": "Spagnolo",
  "lang_code": "es",
  "pos": "noun",
  "pos_title": "Sostantivo, forma flessa",
  "senses": [
    {
      "form_of": [
        {
          "word": "manette"
        }
      ],
      "glosses": [
        "manette"
      ]
    },
    {
      "form_of": [
        {
          "word": "ceppi"
        }
      ],
      "glosses": [
        "ceppi"
      ],
      "topics": [
        "heraldry"
      ]
    },
    {
      "form_of": [
        {
          "word": "hierro"
        }
      ],
      "glosses": [
        "plurale di hierro"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈjeros/"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "hierros"
}