- concussion[concussion 词源字典]
- concussion:  The etymological notion underlying concussion is of ‘violent shaking’; the modern connotation of a ‘jarring injury to the brain’ did not emerge until the 16th century. The word comes from late Latin concussiō, a noun derived from the past participial stem of concutere ‘shake violently’. This was a compound verb formed from the intensive prefix com- and -cutere, an alteration of quatere ‘shake, strike’ (its variant quassāre was the source of English quash and cashier ‘dismiss’, and probably lies behind cascara , etymologically ‘bark broken off the tree’).
The verb concuss is 17th-century. The related percussion  comes ultimately from Latin percutere ‘strike through’.
=> cascara, cashier, percussion, quash, rescue[concussion etymology, concussion origin, 英语词源]
- concussion (n.)
- c. 1400, from Latin concussionem (nominative concussio) "a shaking," noun of action from past participle stem of concutere "shake violently," from com- "together" (see com-) + quatere "to shake" (see quash). Modern brain injury sense is from 1540s.