English idiom
Pandora's box
Register · NeutralNeutral — appropriate in most situations, both spoken and written, without sounding too casual or too stiff.
CEFR C1
Example
“Regulating the prompt cache opened Pandora's box of compliance issues.”
Dictionary details
Related idioms
Expressions connected by reviewed component words or topic tags.
can of worms
CEFR B1a complicated problem that causes trouble the moment it is touched
Informal
domino effect
CEFR B1a chain reaction in which one event triggers a series of similar events
Neutral
in broad daylight
CEFR B1openly and where people can clearly see it, especially during the daytime
Neutral
in hot water
CEFR B1In trouble or facing difficulty.
Informal
in the nick of time
CEFR B1at the latest moment when success is still possible
Neutral
leap of faith
CEFR B1an act of trusting or committing without evidence or guarantees
Neutral
Source methodology
Meanings, register, CEFR, and examples come from the reviewed dictionary record. Expression notes may describe a reviewed present-day word picture or a background note; they are not presented as verified etymology.