SHACKLES

(usually in the plural) A restraint fit over a human or animal appendage, such as a wrist, ankle or finger; normally used in pairs joined by a chain.

"The prisoner lay in shackles in his gloomy cell."

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.

(usually in the plural) A restraint on one's action, activity, or progress.

To restrain using shackles; to place in shackles.

(by extension) To render immobile or incapable; to inhibit the progress or abilities of.

"This law would effectively shackle its opposition."

To shake, rattle.