"jü" meaning in Volapük

{
  "head_templates": [
    {
      "args": {
        "1": "vo",
        "2": "preposition"
      },
      "expansion": "jü",
      "name": "head"
    }
  ],
  "lang": "Volapük",
  "lang_code": "vo",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Volapük entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Volapük prepositions",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "From two till four o’clock in the afternoon.",
          "ref": "1931, Arie de Jong, Gramat Volapüka, § 256",
          "text": "Poszedelo de düp telid jü folid.",
          "type": "quotation"
        },
        {
          "english": "From 1852 to 1855 he studied theology, philology, philosophy, history and medicine at the University of Freiburg im Breisgau.",
          "ref": "1937, “‚Johann Martin Schleyer’”, in Volapükagased pro Nedänapükans, page 34",
          "text": "De 1852 jü 1855 ästudom in niver tö ‚Freiburg im Breisgau’ Godavi, pükavi, filosopi, jenavi e sanavi.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "until"
      ],
      "id": "en-jü-vo-prep-LjIA3oS5",
      "links": [
        [
          "until",
          "until"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ʃy/"
    }
  ],
  "word": "jü"
}

{
  "head_templates": [
    {
      "args": {
        "1": "vo",
        "2": "preposition"
      },
      "expansion": "jü",
      "name": "head"
    }
  ],
  "lang": "Volapük",
  "lang_code": "vo",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        "Volapük entries with incorrect language header",
        "Volapük lemmas",
        "Volapük prepositions",
        "Volapük terms with IPA pronunciation",
        "Volapük terms with quotations"
      ],
      "examples": [
        {
          "english": "From two till four o’clock in the afternoon.",
          "ref": "1931, Arie de Jong, Gramat Volapüka, § 256",
          "text": "Poszedelo de düp telid jü folid.",
          "type": "quotation"
        },
        {
          "english": "From 1852 to 1855 he studied theology, philology, philosophy, history and medicine at the University of Freiburg im Breisgau.",
          "ref": "1937, “‚Johann Martin Schleyer’”, in Volapükagased pro Nedänapükans, page 34",
          "text": "De 1852 jü 1855 ästudom in niver tö ‚Freiburg im Breisgau’ Godavi, pükavi, filosopi, jenavi e sanavi.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "until"
      ],
      "links": [
        [
          "until",
          "until"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ʃy/"
    }
  ],
  "word": "jü"
}