Cangue is a large, heavy wooden collar placed around the neck of a prisoner similar to a yolk or a pillory, except that the timbers are generally not attached to anything other than the prisoner, hence must be carried or dragged everywhere, if that is even possible, while fastened around the neck.
　　[　http://www.chinaknowledge.de/History/Terms/penal_jia.html 枷號 枷禁 枷令 枷稍 枷示　]　
　'Collar' is probably a misnomer since the contraptions are at least a meter or more in diameter with a small hole in the center for the prisoner's neck, but too small to allow the head to pass through and escape. 'Collared' (slang for 'a criminal arrested') would apply, however. Cangues were large enough to prevent the prisoner from feeding herself or himself, or scratching his or her own nose, and so on. If no one assisted by「joining in doing something」with the prisoner, he or she would soon starve. Simply lying down was also impossible without suffocating, and sitting required constant use of muscles to hold the cangue or be asphyxiated, so sleep was nigh impossible. Needless to say, most folks so imprisoned did not remain alive for a long duration in the cangue, although it may have seemed so to those within. Miscreants with a life sentence in the cangue did not remain alive too long.
　「Woody with power and the orifice」describes another aspect apparently useful to the ancient Chinese magistrates and the public at large, which was to enable passersby with free access to the various crotch orifices of the imprisoned human being, for various activities, without the need to deal with much of a struggle. Nothing better than adding to the torture of the detained, as it were.
　Some suggest「woody with added orifice power」as a SCAFFOLD used for autoerotic asphyxiation masturbation techniques…could be, as that activity also binds the neck.

Modern definitions (that generally disregard history) …excluding politically incorrect concepts and other meanings deemed offensive today; may list only pigeonholed definitions, euphemisms, or meaningless mnemonics)
Chinese: cangue (wooden collar like stocks used to restrain and punish criminals in China)
Japanese: shackles, fetters, irons, handcuffs, restraint, constraint, bonds, ties, binding relationship, binding relationships, encumbrance
Unihan extended: cangue scaffold
EDRDG: shackles; irons; handcuffs; bonds