Brown Driver Briggs

 1. to wash, rinse, overflow, engulf, rinse or wash off
  1) (Qal)
1a1. to overflow
1a2. to flow, run
1a3. to rinse or wash off
  2) (Niphal) to be swept away, be rinsed out
  3) (Pual) to be rinsed, be scoured and rinsed