sparge 
(spärj)
(spärj)tr.v. sparged, sparg·ing, sparg·es
1. To spray or sprinkle.
2. To run additional water through (a partly or completely drained mash) to extract more fermentable sugars.
3. To introduce air or gas into (a liquid).
n.
A sprinkle.
[Obsolete French espargier, from Old French, from Latin spargere.]
sparger n.