manacle

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A device for confining the hands, usually consisting of a set of two metal rings that are fastened about the wrists and joined by a metal chain.
• noun Something that confines or restrains.
• transitive verb To put manacles on (someone); restrain with manacles.
• transitive verb To restrain the action or progress of: synonym: hobble.

from The Century Dictionary.

• noun An instrument of iron for fettering the hand; a handcuff or shackle: generally used in the plural.
• noun Synonyms Gyves, Fetter, etc. See shackle.
• To confine the hands of with handcuffs; shackle; hence, to restrain or fetter the will or action; impose constraint upon.

from the GNU version of the Collaborative International Dictionary of English.

• noun A handcuff; a shackle for the hand or wrist; -- usually in the plural.
• transitive verb To put handcuffs or other fastening upon, for confining the hands; to shackle; to confine; to restrain from the use of the limbs or natural powers.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A shackle, consisting of a pair of joined rings, to restrict the free movement of the hands or feet.
• noun Any similar device such as a fetter or handcuffs.
• verb To confine with manacles.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun shackle that consists of a metal loop that can be locked around the wrist; usually used in pairs
• verb confine or restrain with or as if with manacles or handcuffs