percussyoudaoicibaDictYouDict[percuss 词源字典]
"Gently tap (a part of the body) with a finger or an instrument as part of a diagnosis", Mid 16th century (in the general sense 'give a blow to'): from Latin percuss- 'struck forcibly', from the verb percutere, from per- 'through' + quatere 'to shake, strike'.[percuss etymology, percuss origin, 英语词源]