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Pandora’s box - definition and synonyms

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noun [countable]     Pandora’s box pronunciation in American English
/pænˌdɔrəz ˈbɑks/
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singularPandora’s box
pluralPandora’s boxes
 
  1. something that could cause a lot of problems if you do it, use it, or say it
Word story
From Pandora, a character in ancient Greek stories who was given a box as a wedding gift but ordered not to open it. When she opened the box, all the troubles came into the world leaving only Hope inside.
 
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