scour
verb uk/skaʊər/ us/ˈskaʊ.ɚ/
(CLEAN)
[ T ] (also scour out)擦，擦净;刷，刷掉
to remove dirt from something by rubbing it hard with something rough
You'll have to scour out those old cooking pots before you use them. 这些旧锅用之前得好好刷一刷。
(SEARCH)
[ T ]认真搜索，细查
to search a place or thing very carefully in order to try to find something
The police are scouring the area for the missing child. 警方在这个地区四处搜查，寻找失踪的孩子。
I scoured the shops for a blue and white shirt, but I couldn't find one anywhere. 我跑遍商店想买一件蓝白相间的衬衫，但却怎么也买不到。
Phrasal verb
scour something out 冲刷出；磨出
to make a hole by a movement that is repeated continuously over a long period of time
The fast-moving water had scoured out a channel in the rock. 急流在岩石上冲刷出一道凹槽。