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English definition of “powder keg”

powder keg

noun [C] uk   us  
a situation or a place that could easily become extremely dangerous: The build-up of forces in the region is creating a powder keg. The new tax is a political powder keg which could result in widespread violence.Difficult situations and unpleasant experiencesAccidents and disasters
(Definition of powder keg from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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