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

意志の疏通[ishinosotsuu] mutual understanding
上疏[jouso] reporting to the emperor
疏通[sotsuu] (mutual) understanding
弁疏[benso] excuse

注疏[chuuso] detailed commentary
疏水[sosui] canal
註疏[chuuso] notes, commentary