/keuh rayd", kaw-/ , v. , corraded, corrading .
v.i.
1. (of a moving agent, as running water, wind, or a glacier) to erode by the abrasion of materials carried along.
2. to disintegrate as a result of corrasion, as the rock underlying the brink of a waterfall.
v.t.
3. to wear down by corrasion; abrade.
[ 1610-20; corradere to scrape together, equiv. to cor- COR- + radere to scrape. See ERASE, RAZE ]