"nguyên niên" meaning in Vietnamese

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "Sino-Vietnamese words"
      },
      "expansion": "",
      "name": "categorize"
    },
    {
      "args": {
        "1": "元",
        "2": "original",
        "3": "年",
        "4": "year"
      },
      "expansion": "Sino-Vietnamese word from 元年, composed of 元 (“original”) and 年 (“year”)",
      "name": "vi-etym-sino"
    }
  ],
  "etymology_text": "Sino-Vietnamese word from 元年, composed of 元 (“original”) and 年 (“year”).",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "nguyên niên",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "nguyên niên",
      "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": "Sino-Vietnamese words",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Vietnamese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "Gia Long 1",
          "text": "Gia Long nguyên niên",
          "type": "example"
        }
      ],
      "glosses": [
        "the first year of an imperial era"
      ],
      "id": "en-nguyên_niên-vi-noun-n~jgKncI",
      "raw_glosses": [
        "(historical) the first year of an imperial era"
      ],
      "related": [
        {
          "word": "niên hiệu"
        }
      ],
      "tags": [
        "historical"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ŋwiən˧˧ niən˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[ŋwiəŋ˧˧ niəŋ˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[ŋwiəŋ˧˧ niəŋ˧˧]",
      "note": "Saigon"
    }
  ],
  "word": "nguyên niên"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "Sino-Vietnamese words"
      },
      "expansion": "",
      "name": "categorize"
    },
    {
      "args": {
        "1": "元",
        "2": "original",
        "3": "年",
        "4": "year"
      },
      "expansion": "Sino-Vietnamese word from 元年, composed of 元 (“original”) and 年 (“year”)",
      "name": "vi-etym-sino"
    }
  ],
  "etymology_text": "Sino-Vietnamese word from 元年, composed of 元 (“original”) and 年 (“year”).",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "nguyên niên",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "nguyên niên",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "related": [
    {
      "word": "niên hiệu"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Sino-Vietnamese words",
        "Vietnamese entries with incorrect language header",
        "Vietnamese lemmas",
        "Vietnamese nouns",
        "Vietnamese terms with IPA pronunciation",
        "Vietnamese terms with historical senses",
        "Vietnamese terms with usage examples"
      ],
      "examples": [
        {
          "english": "Gia Long 1",
          "text": "Gia Long nguyên niên",
          "type": "example"
        }
      ],
      "glosses": [
        "the first year of an imperial era"
      ],
      "raw_glosses": [
        "(historical) the first year of an imperial era"
      ],
      "tags": [
        "historical"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ŋwiən˧˧ niən˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[ŋwiəŋ˧˧ niəŋ˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[ŋwiəŋ˧˧ niəŋ˧˧]",
      "note": "Saigon"
    }
  ],
  "word": "nguyên niên"
}