shock
 v.— «Ragan then fills the pool with water, shocks it and checks it about a week later to see if the chemicals are OK. “Shocking” a pool refers to using a chemical process called oxidization to break down water-soluble bather waste. Nobody wants to take a dip in a pool of dead skin cells, body oils, sweat and cosmetics, and other unmentionable icky stuff. Some things need to be shocked.» —“Gentlemen, start your pools” Sioux City Journal (Iowa) May 15, 2006. (source: Double-Tongued Dictionary)

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