"errabero" meaning in Basque

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en basque",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en basque",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Basque",
      "orig": "basque",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de erro (« mamelle ») et de bero (« chaud »)."
  ],
  "lang": "Basque",
  "lang_code": "eu",
  "pos": "noun",
  "pos_title": "Nom commun",
  "related": [
    {
      "word": "errebero"
    },
    {
      "translation": "lait",
      "word": "esne"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Aliments en basque",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en basque",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Lait cru."
      ],
      "id": "fr-errabero-eu-noun-fzkf9Qns",
      "topics": [
        "cuisine"
      ]
    }
  ],
  "word": "errabero"
}

{
  "categories": [
    "Compositions en basque",
    "Noms communs en basque",
    "basque"
  ],
  "etymology_texts": [
    "Composé de erro (« mamelle ») et de bero (« chaud »)."
  ],
  "lang": "Basque",
  "lang_code": "eu",
  "pos": "noun",
  "pos_title": "Nom commun",
  "related": [
    {
      "word": "errebero"
    },
    {
      "translation": "lait",
      "word": "esne"
    }
  ],
  "senses": [
    {
      "categories": [
        "Aliments en basque",
        "Wiktionnaire:Exemples manquants en basque"
      ],
      "glosses": [
        "Lait cru."
      ],
      "topics": [
        "cuisine"
      ]
    }
  ],
  "word": "errabero"
}