| 单词 | concussion | 
| 释义 | concussionnoun  con·cus·sion  kən-ˈkə-shən   1   a     : a stunning, damaging, or shattering effect from a hard blow    especially : a jarring injury of the brain resulting in disturbance of cerebral function    The football player suffered a concussion.    b     : a hard blow or collision   2    : agitation, shaking  The concussion from the explosion was felt 12 miles away.    concussive    kən-ˈkə-siv   adjective concussion noun1  as in collision   a forceful coming together of two things the concussion of the two football players sent them both to the ground   Synonyms & Similar Words Relevance     
 2  as in crash   the violent coming together of two bodies into destructive contact the theory that such a concussion, by a giant asteroid or comet millions of years ago, led to the extinction of the dinosaurs   Synonyms & Similar Words 
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