impale/ɪmˈpeɪl; ɪm`pel/ v[Tn, Tn.pr]~ sb/sth (on sth) pierce sb/sth with a sharp-pointed object 用尖物刺（某人[某物]） In former times, prisoners' heads were impaled on pointed stakes. 从前的人把监犯的头钉在尖桩上.
牛津英汉双解词典