"najednou" meaning in Czech

{
  "etymology_templates": [
    {
      "args": {
        "1": "cs",
        "2": "na",
        "3": "jednou"
      },
      "expansion": "na + jednou",
      "name": "compound"
    }
  ],
  "etymology_text": "From na + jednou.",
  "head_templates": [
    {
      "args": {},
      "expansion": "najednou",
      "name": "cs-adv"
    }
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "_dis": "96 4",
          "kind": "other",
          "name": "Czech entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "96 4",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "99 1",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "all of a sudden"
      ],
      "id": "en-najednou-cs-adv-DqVMff95",
      "links": [
        [
          "all of a sudden",
          "all of a sudden"
        ]
      ],
      "synonyms": [
        {
          "word": "náhle"
        },
        {
          "word": "z ničeho nic"
        }
      ]
    },
    {
      "glosses": [
        "at once, at the same time, simultaneously, together"
      ],
      "id": "en-najednou-cs-adv-m5bG3GrN",
      "links": [
        [
          "at once",
          "at once"
        ],
        [
          "at the same time",
          "at the same time"
        ],
        [
          "simultaneously",
          "simultaneously"
        ],
        [
          "together",
          "together"
        ]
      ],
      "synonyms": [
        {
          "word": "zároveň"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈnajɛdnou̯]"
    }
  ],
  "word": "najednou"
}

{
  "categories": [
    "Czech adverbs",
    "Czech compound terms",
    "Czech entries with incorrect language header",
    "Czech lemmas",
    "Czech terms with IPA pronunciation",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "cs",
        "2": "na",
        "3": "jednou"
      },
      "expansion": "na + jednou",
      "name": "compound"
    }
  ],
  "etymology_text": "From na + jednou.",
  "head_templates": [
    {
      "args": {},
      "expansion": "najednou",
      "name": "cs-adv"
    }
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "adv",
  "senses": [
    {
      "glosses": [
        "all of a sudden"
      ],
      "links": [
        [
          "all of a sudden",
          "all of a sudden"
        ]
      ],
      "synonyms": [
        {
          "word": "náhle"
        },
        {
          "word": "z ničeho nic"
        }
      ]
    },
    {
      "glosses": [
        "at once, at the same time, simultaneously, together"
      ],
      "links": [
        [
          "at once",
          "at once"
        ],
        [
          "at the same time",
          "at the same time"
        ],
        [
          "simultaneously",
          "simultaneously"
        ],
        [
          "together",
          "together"
        ]
      ],
      "synonyms": [
        {
          "word": "zároveň"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈnajɛdnou̯]"
    }
  ],
  "word": "najednou"
}