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

一脈[ichimyaku] (a) vein
冠動脈[kandoumyaku] coronary artery
金脈[kinmyaku] (questionable) financial connections
頸静脈[keijoumyaku] jugular vein
けい動脈[keidoumyaku] carotid artery

鉱脈[koumyaku] vein (of ore)
山脈[sanmyaku] mountain range
支脈[shimyaku] spur
主脈[shumyaku] main mountain range
人脈[jinmyaku] personal connections