"нежданно-негаданно" meaning in Russian

{
  "forms": [
    {
      "form": "нежда́нно-нега́данно",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "neždánno-negádanno",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "нежда́нно-нега́данно"
      },
      "expansion": "нежда́нно-нега́данно • (neždánno-negádanno)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              11,
              31
            ]
          ],
          "english": "Then suddenly, out of the blue, a third force appeared on the vast chessboard.",
          "ref": "1925, Михаил Булгаков [Mikhail Bulgakov], “Глава 5”, in Белая гвардия; English translation from Michael Glenny, transl., The White Guard, London: Collins and Harvill Press, 1971:",
          "roman": "Tak vot-s, neždánno-negádanno pojavílasʹ trétʹja síla na gromádnoj šáxmatnoj doské.",
          "text": "Так вот-с, нежда́нно-нега́данно появи́лась тре́тья си́ла на грома́дной ша́хматной доске́.",
          "translation": "Then suddenly, out of the blue, a third force appeared on the vast chessboard.",
          "type": "quote"
        }
      ],
      "glosses": [
        "unexpectedly, out of the blue"
      ],
      "id": "en-нежданно-негаданно-ru-adv--E~uXCwC",
      "links": [
        [
          "unexpectedly",
          "unexpectedly"
        ],
        [
          "out of the blue",
          "out of the blue"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[nʲɪʐˈdanːə nʲɪˈɡadən(ː)ə]"
    }
  ],
  "word": "нежданно-негаданно"
}

{
  "forms": [
    {
      "form": "нежда́нно-нега́данно",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "neždánno-negádanno",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "нежда́нно-нега́данно"
      },
      "expansion": "нежда́нно-нега́данно • (neždánno-negádanno)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Russian adverbs",
        "Russian entries with incorrect language header",
        "Russian lemmas",
        "Russian multiword terms",
        "Russian terms with IPA pronunciation",
        "Russian terms with quotations"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              11,
              31
            ]
          ],
          "english": "Then suddenly, out of the blue, a third force appeared on the vast chessboard.",
          "ref": "1925, Михаил Булгаков [Mikhail Bulgakov], “Глава 5”, in Белая гвардия; English translation from Michael Glenny, transl., The White Guard, London: Collins and Harvill Press, 1971:",
          "roman": "Tak vot-s, neždánno-negádanno pojavílasʹ trétʹja síla na gromádnoj šáxmatnoj doské.",
          "text": "Так вот-с, нежда́нно-нега́данно появи́лась тре́тья си́ла на грома́дной ша́хматной доске́.",
          "translation": "Then suddenly, out of the blue, a third force appeared on the vast chessboard.",
          "type": "quote"
        }
      ],
      "glosses": [
        "unexpectedly, out of the blue"
      ],
      "links": [
        [
          "unexpectedly",
          "unexpectedly"
        ],
        [
          "out of the blue",
          "out of the blue"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[nʲɪʐˈdanːə nʲɪˈɡadən(ː)ə]"
    }
  ],
  "word": "нежданно-негаданно"
}