to be shaved, planed, or worn away; to have material removed from the surface (often as a result of cutting or abrasion).
古いコーナーは歩行でだんだん削れて、丸くなっている。
The old edge has gradually been worn away by foot traffic and become rounded.
このナイフだと木の表面がよく削れるから、細工に向いている。
With this knife the wood's surface shaves off easily, so it's good for carving.