concussion

English Thesaurus

1. any violent blow (noun.event)

hypernym	:	blow, bump,
definition	:	an impact (as from a collision) (noun.event)

2. injury to the brain caused by a blow; usually resulting in loss of consciousness (noun.event)

hypernym	:	accidental injury, injury,
definition	:	an accident that results in physical damage or hurt (noun.event)

3. any violent blow (noun.event)

derivation	:	concuss, concuss,
definition	:	shake violently (verb.motion)

derivation	:	concuss, concuss,
definition	:	shake violently (verb.motion)