Handcuff
来自Big Physics
wiktionary
1640, from hand + cuff(“end of shirtsleeve”). [1]
Possibly an adaptation of Middle English handcops(“shackles for the hand, handcuffs”), from Old English handcops, from hand + cops, cosp(“fetter, chains”), but due to lack of continuity (centuries between Old English and modern term), generally analyzed as a re-invention. [1]
etymonline
handcuff (n.)
1640s as a decorative addition to a sleeve; 1690s as a type of restraining device, from hand (n.) + cuff (n.) in the "fetter for the wrist" sense (attested from 1660s). Old English had hondcops "a pair of hand cuffs," but the modern word is a re-invention. Related: Handcuffs. The verb is first attested 1720. Related: Handcuffed; handcuffing.