硬水

硬水	yìng shuǐ	hard water (cf. 软水, soft water)
硬	yìng	hard; stiff; solid / (fig.) strong; firm / resolutely; uncompromisingly / laboriously; with great difficulty / good (quality); able (person) / (of food) filling; substantial
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