(n)washout, washthe 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”
(v)wash, wash out, wash off, wash awayremove by the application of water or other liquid and soap or some other cleaning agent“he washed the dirt from his coat”, “The nurse washed away the blood”, “Can you wash away the spots on the windows?”, “he managed to wash out the stains”