erode

Entry Definition
(dirt, sand, ice, etc.; garden, beach, etc.) it washes away
(log, soil, rock, etc.) s/he, it erodes from action of water
(log, soil, rock, etc.) s/he, it erodes from action of wind; (hail, sand, dust, etc. on top of something) s/he, it blows off in the wind
(water) it cuts into ground as it flows, erodes bank, etc.
(bread, ice, wall, rock, etc.) s/he, it crumbles, erodes by crumbling
sand that has eroded from rock surface