kidnaper
🇬🇧/ˈkɪdnæpə(r)/ 🇺🇸/ˈkɪdnæpər/someone who takes a person away illegally by force, usually in order to demand money in exchange for releasing them
noun [专属名词] 绑匪;拐子
The kidnaper strangled the child with a piece of string. 绑票的人以一根绳子勒毙这小孩.