"đoan" meaning in Vietnamien

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en vietnamien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Vietnamien",
      "orig": "vietnamien",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Vietnamien",
  "lang_code": "vi",
  "paronyms": [
    {
      "word": "đoàn"
    },
    {
      "word": "doan"
    },
    {
      "word": "đoản"
    },
    {
      "word": "đoán"
    },
    {
      "word": "đoạn"
    }
  ],
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Termes désuets en vietnamien",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Douane."
      ],
      "id": "fr-đoan-vi-noun-Nngz0AVd",
      "tags": [
        "obsolete"
      ]
    },
    {
      "glosses": [
        "Garantir."
      ],
      "id": "fr-đoan-vi-noun-4WIkCsgH"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ɗɔan˦\\"
    },
    {
      "ipa": "ɗ̺ɔan˦",
      "raw_tags": [
        "Nord du Vietnam (Hanoï)"
      ]
    },
    {
      "ipa": "ɗ̺ɔaŋ˦",
      "raw_tags": [
        "Sud du Vietnam (Ho Chi Minh-Ville)"
      ]
    }
  ],
  "word": "đoan"
}

{
  "categories": [
    "Noms communs en vietnamien",
    "vietnamien"
  ],
  "lang": "Vietnamien",
  "lang_code": "vi",
  "paronyms": [
    {
      "word": "đoàn"
    },
    {
      "word": "doan"
    },
    {
      "word": "đoản"
    },
    {
      "word": "đoán"
    },
    {
      "word": "đoạn"
    }
  ],
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Termes désuets en vietnamien"
      ],
      "glosses": [
        "Douane."
      ],
      "tags": [
        "obsolete"
      ]
    },
    {
      "glosses": [
        "Garantir."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ɗɔan˦\\"
    },
    {
      "ipa": "ɗ̺ɔan˦",
      "raw_tags": [
        "Nord du Vietnam (Hanoï)"
      ]
    },
    {
      "ipa": "ɗ̺ɔaŋ˦",
      "raw_tags": [
        "Sud du Vietnam (Ho Chi Minh-Ville)"
      ]
    }
  ],
  "word": "đoan"
}