洗い

(1)the erosive process of washing away soil or gravel by water (as from a roadway); "from the house they watched the washout of their newly seeded lawn by the water"

(2)水で（車道より）土または砂利を流す腐食性のプロセス

(3)the work of cleansing (usually with soap and water)

(4)浄化する仕事（通常石鹸と水で）