"ác mộng" meaning in Vietnamese

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "Sino-Vietnamese words"
      },
      "expansion": "",
      "name": "categorize"
    },
    {
      "args": {
        "1": "惡",
        "2": "bad; vile",
        "3": "夢",
        "4": "dream"
      },
      "expansion": "Sino-Vietnamese word from 惡夢, composed of 惡 (“bad; vile”) and 夢 (“dream”)",
      "name": "vi-etym-sino"
    }
  ],
  "etymology_text": "Sino-Vietnamese word from 惡夢, composed of 惡 (“bad; vile”) and 夢 (“dream”).",
  "forms": [
    {
      "form": "cơn",
      "tags": [
        "classifier"
      ]
    }
  ],
  "head_templates": [
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      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "ác mộng",
      "name": "head"
    },
    {
      "args": {
        "cls": "cơn"
      },
      "expansion": "(classifier cơn) ác mộng",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
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          "name": "Sino-Vietnamese words",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Vietnamese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "Vietnamese nouns classified by cơn",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "nightmare"
      ],
      "id": "en-ác_mộng-vi-noun-bfpe2Zdh",
      "links": [
        [
          "nightmare",
          "nightmare"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ʔaːk̚˧˦ məwŋ͡m˧˨ʔ]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[ʔaːk̚˦˧˥ məwŋ͡m˨˩ʔ]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[ʔaːk̚˦˥ məwŋ͡m˨˩˨]",
      "note": "Saigon"
    },
    {
      "audio": "LL-Q9199 (vie)-Jessica Nguyen (Pamputt)-ác mộng.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/6/66/LL-Q9199_%28vie%29-Jessica_Nguyen_%28Pamputt%29-%C3%A1c_m%E1%BB%99ng.wav/LL-Q9199_%28vie%29-Jessica_Nguyen_%28Pamputt%29-%C3%A1c_m%E1%BB%99ng.wav.mp3",
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    }
  ],
  "word": "ác mộng"
}

{
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        "1": "vi",
        "2": "Sino-Vietnamese words"
      },
      "expansion": "",
      "name": "categorize"
    },
    {
      "args": {
        "1": "惡",
        "2": "bad; vile",
        "3": "夢",
        "4": "dream"
      },
      "expansion": "Sino-Vietnamese word from 惡夢, composed of 惡 (“bad; vile”) and 夢 (“dream”)",
      "name": "vi-etym-sino"
    }
  ],
  "etymology_text": "Sino-Vietnamese word from 惡夢, composed of 惡 (“bad; vile”) and 夢 (“dream”).",
  "forms": [
    {
      "form": "cơn",
      "tags": [
        "classifier"
      ]
    }
  ],
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      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "ác mộng",
      "name": "head"
    },
    {
      "args": {
        "cls": "cơn"
      },
      "expansion": "(classifier cơn) ác mộng",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "senses": [
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        "Pages with entries",
        "Sino-Vietnamese words",
        "Vietnamese entries with incorrect language header",
        "Vietnamese lemmas",
        "Vietnamese nouns",
        "Vietnamese nouns classified by cơn",
        "Vietnamese terms with IPA pronunciation"
      ],
      "glosses": [
        "nightmare"
      ],
      "links": [
        [
          "nightmare",
          "nightmare"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ʔaːk̚˧˦ məwŋ͡m˧˨ʔ]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[ʔaːk̚˦˧˥ məwŋ͡m˨˩ʔ]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[ʔaːk̚˦˥ məwŋ͡m˨˩˨]",
      "note": "Saigon"
    },
    {
      "audio": "LL-Q9199 (vie)-Jessica Nguyen (Pamputt)-ác mộng.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/6/66/LL-Q9199_%28vie%29-Jessica_Nguyen_%28Pamputt%29-%C3%A1c_m%E1%BB%99ng.wav/LL-Q9199_%28vie%29-Jessica_Nguyen_%28Pamputt%29-%C3%A1c_m%E1%BB%99ng.wav.mp3",
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    }
  ],
  "word": "ác mộng"
}