"quyển hạ" meaning in Vietnamese

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "book; notebook"
      },
      "expansion": "book; notebook",
      "name": "l"
    },
    {
      "args": {
        "1": "en",
        "2": "below"
      },
      "expansion": "below",
      "name": "l"
    },
    {
      "args": {
        "1": "vi",
        "2": "quyển",
        "3": "hạ",
        "t1": "book; notebook",
        "t2": "below"
      },
      "expansion": "quyển (“book; notebook”) + hạ (“below”)",
      "name": "com"
    },
    {
      "args": {
        "1": "ja",
        "2": "下",
        "tr": "ge, hạ"
      },
      "expansion": "Japanese 下 (ge, hạ)",
      "name": "cog"
    }
  ],
  "etymology_text": "From quyển (“book; notebook”) + hạ (“below”). Compare Japanese 下 (ge, hạ).",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "quyển hạ",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "quyển hạ",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Vietnamese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Vietnamese nouns without classifiers",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "vi",
          "name": "Books",
          "orig": "vi:Books",
          "parents": [
            "Literature",
            "Mass media",
            "Culture",
            "Entertainment",
            "Writing",
            "Media",
            "Society",
            "Human behaviour",
            "Language",
            "Communication",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "the last book of a two- or three-book series"
      ],
      "id": "en-quyển_hạ-vi-noun-WhOq7ODd",
      "links": [
        [
          "last",
          "last#English"
        ],
        [
          "book",
          "book#English"
        ],
        [
          "two",
          "two#English"
        ],
        [
          "three",
          "three#English"
        ],
        [
          "series",
          "series#English"
        ]
      ],
      "raw_glosses": [
        "(dated) the last book of a two- or three-book series"
      ],
      "related": [
        {
          "word": "quyển thượng"
        },
        {
          "word": "quyển trung"
        }
      ],
      "tags": [
        "dated"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[kwiən˧˩ haː˧˨ʔ]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[kwiəŋ˧˨ haː˨˩ʔ]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[wiəŋ˨˩˦ haː˨˩˨]",
      "tags": [
        "Hồ-Chí-Minh-City"
      ]
    }
  ],
  "word": "quyển hạ"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "book; notebook"
      },
      "expansion": "book; notebook",
      "name": "l"
    },
    {
      "args": {
        "1": "en",
        "2": "below"
      },
      "expansion": "below",
      "name": "l"
    },
    {
      "args": {
        "1": "vi",
        "2": "quyển",
        "3": "hạ",
        "t1": "book; notebook",
        "t2": "below"
      },
      "expansion": "quyển (“book; notebook”) + hạ (“below”)",
      "name": "com"
    },
    {
      "args": {
        "1": "ja",
        "2": "下",
        "tr": "ge, hạ"
      },
      "expansion": "Japanese 下 (ge, hạ)",
      "name": "cog"
    }
  ],
  "etymology_text": "From quyển (“book; notebook”) + hạ (“below”). Compare Japanese 下 (ge, hạ).",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "quyển hạ",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "quyển hạ",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "related": [
    {
      "word": "quyển thượng"
    },
    {
      "word": "quyển trung"
    }
  ],
  "senses": [
    {
      "categories": [
        "Vietnamese compound terms",
        "Vietnamese dated terms",
        "Vietnamese entries with incorrect language header",
        "Vietnamese lemmas",
        "Vietnamese nouns",
        "Vietnamese nouns without classifiers",
        "Vietnamese terms with IPA pronunciation",
        "vi:Books"
      ],
      "glosses": [
        "the last book of a two- or three-book series"
      ],
      "links": [
        [
          "last",
          "last#English"
        ],
        [
          "book",
          "book#English"
        ],
        [
          "two",
          "two#English"
        ],
        [
          "three",
          "three#English"
        ],
        [
          "series",
          "series#English"
        ]
      ],
      "raw_glosses": [
        "(dated) the last book of a two- or three-book series"
      ],
      "tags": [
        "dated"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[kwiən˧˩ haː˧˨ʔ]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[kwiəŋ˧˨ haː˨˩ʔ]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[wiəŋ˨˩˦ haː˨˩˨]",
      "tags": [
        "Hồ-Chí-Minh-City"
      ]
    }
  ],
  "word": "quyển hạ"
}