upheaval
/ʌpˈhiːvəl/noun
1- a violent or sudden change or disruption to something激变, 剧变; 动乱：
major upheavals in the financial markets
金融市场的剧变
mass noun times of political upheaval.政治动荡时期。
1.1
- an upward displacement of part of the earth's crust（地壳）隆起。