[chōng shuā]
（冲水洗刷； 冲蚀） wash; erode; scour; wash out [away]; sluicing; swash; outwash; underwashing
the scour of the tide
潮水的冲刷
wash one's soul from sins
冲刷掉心灵上的罪恶
wash those dirty marks off the wall
冲刷干净墙上的污迹
The torrents scoured out a channel down the hill side.
急流沿着山腰冲刷出一条水沟。