Merriam-Webster Collegiate Dictionary - swat

 geographical name river 400 miles (644 kilometers) Pakistan flowing into Kabul River SWAT  noun  Usage: often attributive  Etymology: special weapons and tactics  Date: 1968 a police or military unit specially trained and equipped to handle unusually hazardous situations or missions SWAT  I. transitive verb  (~ted; ~ting)  Etymology: English dialect, to squat, alteration of English squat  Date: circa 1796 to hit with a sharp slapping blow usually with an instrument (as a bat or fly~ter) ~ted the ball for a home run  II. noun  Date: circa 1800  1. a powerful or crushing blow  2. a long hit in baseball; especially home run