"lưu ban" meaning in Vietnamien

{
  "categories": [
    {
      "kind": "other",
      "name": "Mots en vietnamien issus d’un mot en chinois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Verbes en vietnamien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Vietnamien",
      "orig": "vietnamien",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Du chinois 留班, liúbān."
  ],
  "lang": "Vietnamien",
  "lang_code": "vi",
  "pos": "verb",
  "pos_title": "Verbe",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en vietnamien",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Lexique en vietnamien de l’éducation",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Học sinh lưu ban.",
          "translation": "Redoublant."
        }
      ],
      "glosses": [
        "Redoubler un niveau."
      ],
      "id": "fr-lưu_ban-vi-verb-jGbTBTpl",
      "topics": [
        "education"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\lɯu˦.ban˦\\"
    },
    {
      "ipa": "lɯu˦.ɓan˦",
      "raw_tags": [
        "Hanoï (Nord du Vietnam)"
      ]
    },
    {
      "ipa": "lɯu˦.ɓaŋ˦",
      "raw_tags": [
        "Hô-Chi-Minh-Ville (Sud du Vietnam)"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "lưu lớp"
    }
  ],
  "word": "lưu ban"
}

{
  "categories": [
    "Mots en vietnamien issus d’un mot en chinois",
    "Verbes en vietnamien",
    "vietnamien"
  ],
  "etymology_texts": [
    "Du chinois 留班, liúbān."
  ],
  "lang": "Vietnamien",
  "lang_code": "vi",
  "pos": "verb",
  "pos_title": "Verbe",
  "senses": [
    {
      "categories": [
        "Exemples en vietnamien",
        "Lexique en vietnamien de l’éducation"
      ],
      "examples": [
        {
          "text": "Học sinh lưu ban.",
          "translation": "Redoublant."
        }
      ],
      "glosses": [
        "Redoubler un niveau."
      ],
      "topics": [
        "education"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\lɯu˦.ban˦\\"
    },
    {
      "ipa": "lɯu˦.ɓan˦",
      "raw_tags": [
        "Hanoï (Nord du Vietnam)"
      ]
    },
    {
      "ipa": "lɯu˦.ɓaŋ˦",
      "raw_tags": [
        "Hô-Chi-Minh-Ville (Sud du Vietnam)"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "lưu lớp"
    }
  ],
  "word": "lưu ban"
}