"nguyên âm đôi" meaning in Vietnamese

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "nguyên âm",
        "3": "đôi"
      },
      "expansion": "nguyên âm + đôi",
      "name": "com"
    }
  ],
  "etymology_text": "nguyên âm + đôi.",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "nguyên âm đôi",
        "tr": ""
      },
      "expansion": "nguyên âm đôi",
      "name": "head"
    },
    {
      "args": {
        "head": "nguyên âm đôi"
      },
      "expansion": "nguyên âm đôi",
      "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"
        },
        {
          "kind": "other",
          "name": "Vietnamese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "vi",
          "name": "Linguistics",
          "orig": "vi:Linguistics",
          "parents": [
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "diphthong"
      ],
      "id": "en-nguyên_âm_đôi-vi-noun-jb1ocCtv",
      "links": [
        [
          "diphthong",
          "diphthong"
        ]
      ],
      "related": [
        {
          "english": "monophthong",
          "word": "nguyên âm đơn"
        }
      ],
      "synonyms": [
        {
          "word": "nhị trùng âm"
        }
      ],
      "wikipedia": [
        "vi:nguyên âm đôi"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ŋwiən˧˧ ʔəm˧˧ ʔɗoj˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[ŋwiəŋ˧˧ ʔəm˧˧ ʔɗoj˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[ŋwiəŋ˧˧ ʔəm˧˧ ʔɗoj˧˧]",
      "note": "Saigon"
    },
    {
      "audio": "LL-Q9199 (vie)-Penn Zero MSSJ-nguyên âm đôi.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c3/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-nguy%C3%AAn_%C3%A2m_%C4%91%C3%B4i.wav/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-nguy%C3%AAn_%C3%A2m_%C4%91%C3%B4i.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c3/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-nguy%C3%AAn_%C3%A2m_%C4%91%C3%B4i.wav/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-nguy%C3%AAn_%C3%A2m_%C4%91%C3%B4i.wav.ogg"
    }
  ],
  "word": "nguyên âm đôi"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "nguyên âm",
        "3": "đôi"
      },
      "expansion": "nguyên âm + đôi",
      "name": "com"
    }
  ],
  "etymology_text": "nguyên âm + đôi.",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "nguyên âm đôi",
        "tr": ""
      },
      "expansion": "nguyên âm đôi",
      "name": "head"
    },
    {
      "args": {
        "head": "nguyên âm đôi"
      },
      "expansion": "nguyên âm đôi",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "related": [
    {
      "english": "monophthong",
      "word": "nguyên âm đơn"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Vietnamese compound terms",
        "Vietnamese entries with incorrect language header",
        "Vietnamese lemmas",
        "Vietnamese nouns",
        "Vietnamese terms with IPA pronunciation",
        "vi:Linguistics"
      ],
      "glosses": [
        "diphthong"
      ],
      "links": [
        [
          "diphthong",
          "diphthong"
        ]
      ],
      "synonyms": [
        {
          "word": "nhị trùng âm"
        }
      ],
      "wikipedia": [
        "vi:nguyên âm đôi"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ŋwiən˧˧ ʔəm˧˧ ʔɗoj˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[ŋwiəŋ˧˧ ʔəm˧˧ ʔɗoj˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[ŋwiəŋ˧˧ ʔəm˧˧ ʔɗoj˧˧]",
      "note": "Saigon"
    },
    {
      "audio": "LL-Q9199 (vie)-Penn Zero MSSJ-nguyên âm đôi.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c3/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-nguy%C3%AAn_%C3%A2m_%C4%91%C3%B4i.wav/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-nguy%C3%AAn_%C3%A2m_%C4%91%C3%B4i.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c3/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-nguy%C3%AAn_%C3%A2m_%C4%91%C3%B4i.wav/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-nguy%C3%AAn_%C3%A2m_%C4%91%C3%B4i.wav.ogg"
    }
  ],
  "word": "nguyên âm đôi"
}