SCOURING

clean or brighten the surface of (something) by rubbing it hard, typically with an abrasive or detergent

(of livestock) suffer from diarrhoea

the action of scouring or the state of being scoured, especially by swift-flowing water

diarrhoea in livestock, especially cattle and pigs.

subject (a place, text, etc.) to a thorough search in order to locate something