悪水[akusui] undrinkable water
井戸水[idomizu] well water
一衣帯水[ichiitaisui] (being separated only by a) narrow strip of water
一水[issui] current (of water)
溢水[issui] inundation

飲水量[insuiryou] amount of drinking
飲料水[inryousui] drinking water
烏の行水[karasunogyouzui] quick bath
雲水[unsui] itinerant priest
塩化水素[enkasuiso] hydrogen chloride

漉す[kosu] to filter
絹漉し[kinugoshi] filtering or straining through silk cloth
手漉[tesuki] handmade paper
茶漉し[chakoshi] tea strainer
紙漉き[kamisuki] paper making

漉紙[koshigami] filter paper
水漉し[mizukoshi] water filter
漉し器[koshiki] filter
裏漉し[uragoshi] strainer
漉く[suku] to make something (i.e. paper) from wet, pulpy material by spreading it thin and drying it

濾す[kosu] to filter
濾過[roka] filtration
濾紙[roshi] filter paper
圧濾器[atsuroki] filter press
濾過器[rokaki] strainer

水濾[mizukoshi] water filter
濾液[roeki] filtrate
濾水[rosui] filtered water
濾水タンク[rosuitanku] filter bed
濾水器[rosuiki] water filter