"shackles" in the noun sense
1. shackle, bond, hamper, trammel
a restraint that confines or restricts freedom (especially something used to tie down or restrain a prisoner)
a U-shaped bar the open end can be passed through chain links and closed with a bar
"shackles" in the verb sense
1. pinion, shackle
bind the arms of
2. fetter, shackle
restrain with fetters
Source: WordNet® (An amazing lexical database of English)
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