浄水 (じょうすい)clean water

浄水, its kanji, and other words that share them.Open this graph

Kanji in 浄水

浄化じょうかpurification
洗浄せんじょうwashing; cleansing
自浄じじょうself-purification; self-cleansing
浄化槽じょうかそうwater-purification tank
浄土真宗じょうどしんしゅうJōdo Shinshū (offshoot of the Jōdo sect); True Pure Land School
浄土じょうどpure land (esp. the Western Pure Land paradise of Amitabha); (Buddhist) paradise
清浄せいじょうpure; clean
不浄ふじょうuncleanliness; dirtiness
水みずwater (esp. cool, fresh water, e.g. drinking water)
水準すいじゅんlevel; standard
水道すいどうwater supply; water service
水面すいめんwater's surface
水俣病みなまたびょうMinamata disease
水泳すいえいswimming
水田すいでん(water-filled) paddy field
水産すいさんaquatic products; fisheries

See how 浄水 connects to the rest of Japanese.