"open Pandora's box" meaning in English

{
  "forms": [
    {
      "form": "opens Pandora's box",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "opening Pandora's box",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "opened Pandora's box",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "opened Pandora's box",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*",
        "head": "open Pandora's box"
      },
      "expansion": "open Pandora's box (third-person singular simple present opens Pandora's box, present participle opening Pandora's box, simple past and past participle opened Pandora's box)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2022 August 4, Adam Nayman, “Five Sci-Fi Classics, One Summer: How 1982 Shaped Our Present”, in The New York Times",
          "text": "It’s a thin line between charming, candy-flavored verisimilitude and craven commercialism, and if Spielberg ultimately stayed on the right side of it, “E.T.” nevertheless helped open a Pandora’s box of product placement.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To perform an action that causes problems to appear which did not exist beforehand, or were not known about prior."
      ],
      "id": "en-open_Pandora's_box-en-verb-MBcByWDI",
      "links": [
        [
          "perform",
          "perform"
        ],
        [
          "action",
          "action"
        ],
        [
          "problem",
          "problem"
        ],
        [
          "beforehand",
          "beforehand"
        ],
        [
          "prior",
          "prior"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) To perform an action that causes problems to appear which did not exist beforehand, or were not known about prior."
      ],
      "related": [
        {
          "word": "sow dragon's teeth"
        }
      ],
      "tags": [
        "idiomatic"
      ],
      "translations": [
        {
          "code": "fr",
          "lang": "French",
          "sense": "to perform an action that causes problems",
          "word": "ouvrir la boîte de Pandore"
        },
        {
          "code": "oc",
          "lang": "Occitan",
          "sense": "to perform an action that causes problems",
          "word": "obrir la bóstia de Pandora"
        },
        {
          "code": "ro",
          "lang": "Romanian",
          "sense": "to perform an action that causes problems",
          "word": "deschide cutia Pandorei"
        }
      ]
    }
  ],
  "word": "open Pandora's box"
}

{
  "forms": [
    {
      "form": "opens Pandora's box",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "opening Pandora's box",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "opened Pandora's box",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "opened Pandora's box",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*",
        "head": "open Pandora's box"
      },
      "expansion": "open Pandora's box (third-person singular simple present opens Pandora's box, present participle opening Pandora's box, simple past and past participle opened Pandora's box)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "related": [
    {
      "word": "sow dragon's teeth"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English idioms",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "English verbs"
      ],
      "examples": [
        {
          "ref": "2022 August 4, Adam Nayman, “Five Sci-Fi Classics, One Summer: How 1982 Shaped Our Present”, in The New York Times",
          "text": "It’s a thin line between charming, candy-flavored verisimilitude and craven commercialism, and if Spielberg ultimately stayed on the right side of it, “E.T.” nevertheless helped open a Pandora’s box of product placement.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To perform an action that causes problems to appear which did not exist beforehand, or were not known about prior."
      ],
      "links": [
        [
          "perform",
          "perform"
        ],
        [
          "action",
          "action"
        ],
        [
          "problem",
          "problem"
        ],
        [
          "beforehand",
          "beforehand"
        ],
        [
          "prior",
          "prior"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) To perform an action that causes problems to appear which did not exist beforehand, or were not known about prior."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "translations": [
    {
      "code": "fr",
      "lang": "French",
      "sense": "to perform an action that causes problems",
      "word": "ouvrir la boîte de Pandore"
    },
    {
      "code": "oc",
      "lang": "Occitan",
      "sense": "to perform an action that causes problems",
      "word": "obrir la bóstia de Pandora"
    },
    {
      "code": "ro",
      "lang": "Romanian",
      "sense": "to perform an action that causes problems",
      "word": "deschide cutia Pandorei"
    }
  ],
  "word": "open Pandora's box"
}