fetter
fĕt′ər
noun
A device, usually one of a pair of rings connected to a chain, that is attached to the ankles or feet to restrict movement.
Something that serves to restrict; a restraint.
A chain or bar by which a person or an animal is confined by the foot, so that he is either made fast to an object or deprived of free motion by having one foot attached to the other; a shackle.