chock

chock
noun
  1. a wedge or block placed against a wheel or rounded object, to prevent it from moving
    (轮子或圆形物下防滚动的)楔子;垫木
    ■a support on which a rounded structure, such as a cask or the hull of a boat, may be placed to keep it steady
    (桶等圆形结构的)支架,支座;(船身的)定盘,艇座
  2. a ring with a gap at the top, through which a rope or line is run
    导缆钩,导缆器
verb
  1. [with obj.](常作 be chocked)prevent the forward movement of (a wheel or vehicle) with a chock
    用楔子挡住(轮子,车辆)(防止滚动)
    ■(Brit.)support (a boat, cask, etc.) on chocks
    (英)将(船、桶等)置于支架上
语源
  1. Middle English: probably from an Old Northern French variant of Old French çouche, çoche 'block, log', of unknown ultimate origin
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