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

黄碧玉[kouhekigyoku] yellow jasper
紺碧[konpeki] deep blue
碧い[aoi] blue
丹碧[tanpeki] red and green
碧眼[hekigan] blue eyes

碧玉[hekigyoku] jasper
碧空[hekikuu] blue sky
碧山[hekizan] green mountains
碧水[hekisui] blue water