shackle

Definitions

• (usually) A restraint fit over a human or animal appendage, such as a wrist, ankle or finger; normally used in pairs joined by a chain.
• A U-shaped piece of metal secured with a pin or bolt across the opening, or a hinged metal loop secured with a quick-release locking pin mechanism.
• (figuratively) A restraint on one's action, activity, or progress.
• A fetter-like band worn as an ornament.
• A link for connecting railroad cars; a drawlink or draglink.
• A length of cable or chain equal to fathoms or 75 feet, or later to 15 fathoms.
• Stubble.