headless (adj.)youdaoicibaDictYouDict[headless 词源字典]
late Old English, heafedleas; see head (n.) + -less. Late 14c. as "rulerless, lacking a leader." Related: Headlessly; headlessness. Similar construction in Dutch hoofdeloos, German hauptlos, Danish hovedlös.[headless etymology, headless origin, 英语词源]