"dê-rô" meaning in Vietnamese

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "fr",
        "3": "zéro"
      },
      "expansion": "French zéro",
      "name": "bor"
    }
  ],
  "etymology_text": "French zéro.",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "numeral",
        "head": "",
        "tr": ""
      },
      "expansion": "dê-rô",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "dê-rô",
      "name": "vi-numeral"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "num",
  "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": "Education",
          "orig": "vi:Education",
          "parents": [
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "vi",
          "name": "Zero",
          "orig": "vi:Zero",
          "parents": [
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "zero"
      ],
      "id": "en-dê-rô-vi-num--RlOc~np",
      "links": [
        [
          "education",
          "education"
        ],
        [
          "zero",
          "zero"
        ]
      ],
      "raw_glosses": [
        "(colloquial, chiefly education) zero"
      ],
      "synonyms": [
        {
          "word": "không"
        }
      ],
      "tags": [
        "colloquial"
      ],
      "topics": [
        "education"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ze˧˧ zo˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[jej˧˧ ʐow˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[jej˧˧ ɹow˧˧]",
      "note": "Saigon"
    },
    {
      "audio": "LL-Q9199 (vie)-Penn Zero MSSJ-dê-rô.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/98/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-d%C3%AA-r%C3%B4.wav/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-d%C3%AA-r%C3%B4.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/98/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-d%C3%AA-r%C3%B4.wav/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-d%C3%AA-r%C3%B4.wav.ogg"
    }
  ],
  "word": "dê-rô"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "fr",
        "3": "zéro"
      },
      "expansion": "French zéro",
      "name": "bor"
    }
  ],
  "etymology_text": "French zéro.",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "numeral",
        "head": "",
        "tr": ""
      },
      "expansion": "dê-rô",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "dê-rô",
      "name": "vi-numeral"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Vietnamese colloquialisms",
        "Vietnamese entries with incorrect language header",
        "Vietnamese lemmas",
        "Vietnamese numerals",
        "Vietnamese terms borrowed from French",
        "Vietnamese terms derived from French",
        "Vietnamese terms with IPA pronunciation",
        "vi:Education",
        "vi:Zero"
      ],
      "glosses": [
        "zero"
      ],
      "links": [
        [
          "education",
          "education"
        ],
        [
          "zero",
          "zero"
        ]
      ],
      "raw_glosses": [
        "(colloquial, chiefly education) zero"
      ],
      "synonyms": [
        {
          "word": "không"
        }
      ],
      "tags": [
        "colloquial"
      ],
      "topics": [
        "education"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ze˧˧ zo˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[jej˧˧ ʐow˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[jej˧˧ ɹow˧˧]",
      "note": "Saigon"
    },
    {
      "audio": "LL-Q9199 (vie)-Penn Zero MSSJ-dê-rô.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/98/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-d%C3%AA-r%C3%B4.wav/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-d%C3%AA-r%C3%B4.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/98/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-d%C3%AA-r%C3%B4.wav/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-d%C3%AA-r%C3%B4.wav.ogg"
    }
  ],
  "word": "dê-rô"
}