scour

Short definition from Wiktionary

Verb

1. 1
   To clean, polish, or wash (something) by rubbing and scrubbing it vigorously, frequently with an abrasive or cleaning agent.
2. 2
   To remove debris and dirt (from something) by purging; to sweep along or off by a current of water.
3. 3
   To clear the digestive tract (of an animal) by administering medication that induces defecation or vomiting; to purge.
4. 4
   To (cause livestock to) suffer from diarrhoea or dysentery.
5. 5
   To cleanse (something) without rubbing.
6. 6
   To search an area thoroughly.
7. 7
   To run with speed; to scurry.
8. 8
   To move swiftly over; to brush along.

Noun

1. 1
   The removal of sediment caused by swiftly moving water.
2. 2
   A place scoured out by running water, as in the bed of a stream below a waterfall.
3. 3
   A place where wool is washed to remove grease and impurities prior to processing.
4. 4
   Diarrhoea, in livestock; scouring.