Upheaval (noun)

1. A violent or sudden change, particularly in political or social conditions.
2. A state of confusion or disturbance, often caused by a major change or event.

Origin:

From old english uphafian, from up- "up" + habban "to have".

Examples:

1. The country was thrown into upheaval when the king was overthrown.
2. The company was going through an upheaval as it restructured and laid off workers.
3. The election resulted in an upheaval of the political landscape.
4. The community was in an upheaval as it struggled to come to terms with the devastating flood.
5. The recent upheaval in the stock market has left many investors feeling uncertain about the future.