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

谿間[keikan] ravine
谿谷[keikoku] valley
谿声[keisei] sound of a valley stream
谿壑[keigaku] ravine

谿澗[keikan] mountain stream
谿水[keisui] mountain stream
谿泉[keisen] a spring that gushes forth from a valley