退水

退水	tuì shuǐ	to divert water / to drain
退	tuì	to retreat; to withdraw / to reject; to return (sth) / to decline
水	Shuǐ	surname Shui
水	shuǐ	water / (after a name) ... River / to swim (used mostly in 会水 and 水性) / (coll.) lacking in substance; shoddy / (bound form) additional cost; extra income / classifier for washings of a garment