mass noun
1- the motion of receding waves（水波的）反流。
1.1
- a backward current created by an object moving through water or air（由物体在水或空气中逆向运动引起的）反流。
1.2
- figurative repercussions〈喻〉后果; 反响：
the backwash of the Cuban missile crisis.
古巴导弹危机的后果。