"地金の錆" meaning in 日本語

{
  "categories": [
    {
      "kind": "other",
      "name": "日本語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 名詞",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "ここでの「地金」は、「本性」のたとえ。"
  ],
  "forms": [
    {
      "form": "じがねのさび"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "glosses": [
        "生まれつき持っている、悪い癖や習慣。生来の悪癖。（参考：『広辞苑』第七版）"
      ],
      "id": "ja-地金の錆-ja-noun-c445VeKc",
      "ruby": [
        [
          "癖",
          "くせ"
        ]
      ]
    }
  ],
  "word": "地金の錆"
}

{
  "categories": [
    "日本語",
    "日本語 名詞"
  ],
  "etymology_texts": [
    "ここでの「地金」は、「本性」のたとえ。"
  ],
  "forms": [
    {
      "form": "じがねのさび"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "glosses": [
        "生まれつき持っている、悪い癖や習慣。生来の悪癖。（参考：『広辞苑』第七版）"
      ],
      "ruby": [
        [
          "癖",
          "くせ"
        ]
      ]
    }
  ],
  "word": "地金の錆"
}