scours , scouring , scoured
If you scour something such as a place or a book, you make a thorough search of it to try to find what you are looking for.
Rescue crews had scoured an area of 30 square miles.
救援人员已经搜遍了30平方英里的范围。
If you scour something such as a sink, floor, or pan, you clean its surface by rubbing it hard with something rough.
He decided to scour the sink.
他决定把水池擦洗干净。