SCOUR

(CLEAN) [verb] [T] - to remove dirt from (something) by rubbing with something roughThe plates were easy to wash, but the saucepans needed scouring.You'll have to scour (out) those old cooking pots before you use them. [M]I had to use scouring powder to get those stains off the sink.(figurative) The fast-moving water had scoured (out) (= formed by flowing continuously) a channel in the rock. [M](figurative) She had scoured away (= hidden or removed) all evidence of nervousness and appeared completely calm.