Meaning of “powder keg” in the English Dictionary

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"powder keg" in American English

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powder kegnoun [ C ]

us /ˈpɑʊ·dər ˌkeɡ/

a situation that is dangerous and that could become violent:

Tension was high following the protest and several city leaders called the inner city a powder keg.

(Definition of “powder keg” from the Cambridge Academic Content Dictionary © Cambridge University Press)