IPA: //dɪˈkæpɪˌteɪt//
KK: /dɪˈkæpɪˌteɪt/
To cut off someone's head; to behead.
The ancient punishment for treason was to decapitate the offender.
Past: decapitated
Past Participle: decapitated
Decapitate is formed from "de-" (meaning down or away) and "caput" (meaning head). The word describes the act of removing the head, as if taking it away from the body.
Think of 'taking away' ('de-') the 'head' ('caput') — that's why decapitate means to remove the head.