Meaning

noun a restraint that confines or restricts freedom (especially something used to tie down or restrain a prisoner)

noun a U-shaped bar; the open end can be passed through chain links and closed with a bar

verb bind the arms of

originFrom Middle English shakel, schakkyl, schakle (“a fetter, shackle; coupling used to connect a plough or wagon to a draft chain”), from Old English sċacul, sċeacel, sċeacul (“fetter, shackle”), from Proto-West Germanic *skakul, from Proto-Germanic *skakulaz (“shackle”), possibly from *skakaną (“to shake; to swing; to escape”), from Proto-Indo-European *skeg-, *skek- (“to shake; to stir”). However,…

Etymology from Wiktionary, CC BY-SA 3.0