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

陰湿[inshitsu] malicious
加湿[kashitsu] humidification
加湿機[kashitsuki] humidifier
乾湿[kanshitsu] degree of humidity
乾湿計[kanshitsukei] humidity meter

湿す[shimesu] to wet
湿り[shimeri] dampness
湿る[shimeru] to be wet
湿気[shikke] moisture
湿気る[shikeru] to be damp