"大姦は忠に似たり" meaning in 日本語

{
  "categories": [
    {
      "kind": "other",
      "name": "故事成語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語_ことわざ",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語_成句",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "由来_宋史",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "『宋史』呂誨伝。"
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "phrase",
  "pos_title": "成句",
  "senses": [
    {
      "glosses": [
        "大悪人こそ、巧みに主君の忠臣を装うものだということ。"
      ],
      "id": "ja-大姦は忠に似たり-ja-phrase-kvyMPauI"
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "大姦は忠に似たり"
}

{
  "categories": [
    "故事成語",
    "日本語",
    "日本語_ことわざ",
    "日本語_成句",
    "由来_宋史"
  ],
  "etymology_texts": [
    "『宋史』呂誨伝。"
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "phrase",
  "pos_title": "成句",
  "senses": [
    {
      "glosses": [
        "大悪人こそ、巧みに主君の忠臣を装うものだということ。"
      ]
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "大姦は忠に似たり"
}