金無垢[kinmuku] pure gold
歯垢[shikou] (dental) plaque
耳垢[mimiaka] earwax
手垢[teaka] finger marks
無垢[muku] purity

頭垢[fuke] dandruff
垢抜ける[akanukeru] to refine
純真無垢[junshinmuku] pure
寒垢離[kangori] cold-water ablutions performed in winter

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