"dấu huyền" meaning in Vietnamese

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "dấu",
        "3": "huyền",
        "t1": "diacritic"
      },
      "expansion": "dấu (“diacritic”) + huyền",
      "name": "compound"
    }
  ],
  "etymology_text": "dấu (“diacritic”) + huyền (from the fact that the word huyền has the tone written with a grave accent)",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "dấu huyền",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "dấu huyền",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "vi",
          "name": "Linguistics",
          "orig": "vi:Linguistics",
          "parents": [
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "grave accent"
      ],
      "id": "en-dấu_huyền-vi-noun-ixTH9Vbd",
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "grave accent",
          "grave accent"
        ]
      ],
      "raw_glosses": [
        "(linguistics) grave accent"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "vi",
          "name": "Linguistics",
          "orig": "vi:Linguistics",
          "parents": [
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "10 90",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "6 94",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "14 86",
          "kind": "other",
          "name": "Vietnamese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "huyền tone, falling tone"
      ],
      "id": "en-dấu_huyền-vi-noun-oma~w6r5",
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "tone",
          "tone"
        ]
      ],
      "raw_glosses": [
        "(linguistics) huyền tone, falling tone"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[zəw˧˦ hwiən˨˩]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[jəw˨˩˦ hwiəŋ˦˩]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[jəw˦˥ wiəŋ˨˩]",
      "note": "Saigon"
    }
  ],
  "word": "dấu huyền"
}

{
  "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"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "dấu",
        "3": "huyền",
        "t1": "diacritic"
      },
      "expansion": "dấu (“diacritic”) + huyền",
      "name": "compound"
    }
  ],
  "etymology_text": "dấu (“diacritic”) + huyền (from the fact that the word huyền has the tone written with a grave accent)",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "dấu huyền",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "dấu huyền",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "vi:Linguistics"
      ],
      "glosses": [
        "grave accent"
      ],
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "grave accent",
          "grave accent"
        ]
      ],
      "raw_glosses": [
        "(linguistics) grave accent"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    },
    {
      "categories": [
        "vi:Linguistics"
      ],
      "glosses": [
        "huyền tone, falling tone"
      ],
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "tone",
          "tone"
        ]
      ],
      "raw_glosses": [
        "(linguistics) huyền tone, falling tone"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[zəw˧˦ hwiən˨˩]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[jəw˨˩˦ hwiəŋ˦˩]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[jəw˦˥ wiəŋ˨˩]",
      "note": "Saigon"
    }
  ],
  "word": "dấu huyền"
}