冲蚀

冲蚀	chōng shí	to erode / erosion
冲	chōng	(of water) to dash against / to mix with water / to infuse / to rinse / to flush / to develop (a film) / to rise in the air / to clash / to collide with
冲	chōng	thoroughfare / to go straight ahead / to rush / to clash
冲	chòng	powerful / vigorous / pungent / towards / in view of
蚀	shí	to nibble away at sth / to eat into / to erode