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upheaval

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upheaval/ˌʌpˈhiːvəl/noun
pluralupheavals
upheaval
/ˌʌpˈhiːvəl/
noun
pluralupheavals
Learner's definition of UPHEAVAL  
: a major change or period of change that causes a lot of conflict, confusion, anger, etc.
[noncount]
[count]
technical  : an occurrence in which a part of the Earth's surface moves up forcefully
[count]
[noncount]
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