"den of iniquity" meaning in English

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  "etymology_text": "Unclear, but probably inspired by the \"den of thieves\" in the KJV Bible (Matthew 21:13: My house shall be called the house of prayer; but you have made it a den of thieves), which is a calque of Latin spēlunca latrōnum.",
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      "form": "dens of iniquity",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "ref": "1840, George Dabney, The History of an Adventurer",
          "text": "The young men made their preparations with alacrity, and, headed by this western patriarch, we proceeded at a rapid gait to surprize the tenants of this den of iniquity.",
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        },
        {
          "ref": "1944, Robert Howard, Texas John Alden",
          "text": "\"Shet up!\" I snarled. \"I'm jest payin' yuh back for all the pain and humiliation I suffered in this den of iniquity--\"",
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        "A place of immoral behavior, often of a sexual type."
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        "(idiomatic) A place of immoral behavior, often of a sexual type."
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  "word": "den of iniquity"
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  "etymology_text": "Unclear, but probably inspired by the \"den of thieves\" in the KJV Bible (Matthew 21:13: My house shall be called the house of prayer; but you have made it a den of thieves), which is a calque of Latin spēlunca latrōnum.",
  "forms": [
    {
      "form": "dens of iniquity",
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          "ref": "1840, George Dabney, The History of an Adventurer",
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        },
        {
          "ref": "1944, Robert Howard, Texas John Alden",
          "text": "\"Shet up!\" I snarled. \"I'm jest payin' yuh back for all the pain and humiliation I suffered in this den of iniquity--\"",
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        "A place of immoral behavior, often of a sexual type."
      ],
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        "(idiomatic) A place of immoral behavior, often of a sexual type."
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        "King James Version"
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