scouring

noun3

1. •
   The act of cleaning a surface by rubbing it with a brush, soap and water.
2. •
   Erosion by water, especially in watercourses.

   • It was also found that scouring had occurred in the bed of the mill lade, which passes between the first and second piers. — 1950
3. •
   Diarrhea. (Now used only of livestock, though also sometimes used of humans into the 1600s.)

   • For that kind of lax and scouring called bloody flux, see the article BLOODY FLUX. — 1766