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

永牢[eirou] life imprisonment
堅牢[kenrou] solid
入牢[nyuurou] imprisonment
牢屋[rouya] jail
破牢[harou] prison breaking

牢獄[rougoku] prison
土牢[tsuchirou] dungeon
水牢[mizurou] (punishment by being placed in a) water-filled chamber
牢固[rouko] firm
牢死[roushi] dying in prison