Havoc is great disorder and confusion.
Rioters caused havoc in the centre of the town.
暴徒在市中心造成了极大的混乱。
play havoc , wreak havoc
If one thing plays havoc with another or wreaks havoc on it, it prevents it from continuing or functioning as normal, or damages it.
The weather played havoc with airline schedules.
天气状况打乱了航空公司的航班安排。