concussion

concussion
noun
  1. [mass noun]temporary unconsciousness caused by a blow on the head. The term is also used loosely of the after-effects such as confusion or temporary incapacity
    (头部被击导致的)暂时知觉丧失;脑震荡
  2. a violent shock as from a heavy blow
    猛击;剧烈震动;震荡
    the ground shuddered with the concussion of the blast.
    地面由于爆炸的冲击而震动。
语源
  1. late Middle English: from Latin concussio(n-), from the verb concutere 'dash together, shake' (see concuss)
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