1. 余波；不良后果
The backwash of an event or situation is an unpleasant situation that exists after it and as a result of it.
1. the wave that spreads behind a boat as it moves forward
e.g. the motorboat's wake capsized the canoe
Synonym: wake
2. the consequences of an event (especially a catastrophic event)
e.g. the aftermath of war
in the wake of the accident no one knew how many had been injured
3. the flow of air that is driven backwards by an aircraft propeller
Synonym: slipstreamairstreamracewash