lithotripsy (n.) Look up lithotripsy at Dictionary.com
1834, from litho- + -tripsy, from Greek tripsis "rubbing," from tribein "to rub, thresh, pound, wear out," from PIE root *tere- (1) "to rub, turn, twist" (see throw (v.)). Klein says the intended Greek word is thryptein "to crush" and there has been "confusion" with tribein.