shackle - definition and synonyms

noun [countable] [usually plural] 

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/ˈʃæk(ə)l/
singularshackle
pluralshackles
  1. 1
    mainly literary something that prevents you from doing what you want to do
  2. 2
    one of a pair of connected metal rings that can be locked onto the wrists or legs of a prisoner
    See also handcuffs