henchman
/ˈhentʃmən/noun
(pl. -men /-mən/)
1- chiefly derogatory a faithful follower or political supporter, especially one prepared to engage in crime or dishonest practices by way of service〈主贬〉（尤指准备参与犯罪或搞阴谋诡计的）心腹, 亲信, （政治上的）追随者。
1.1
- historical a squire or page of honour to a person of rank〈史〉（有地位的人的）荣誉侍卫（或随从）。
1.2
- (in Scotland) the principal attendant of a Highland chief（苏格兰高地人首领的）首席侍卫。
词源
Middle English, from Old English hengest 'male horse' + MAN, the original sense being probably 'groom'. In the mid 18th cent. the sense 'principal attendant of a Highland chief' was popularized by Sir Walter Scott, whence the current (originally US) usage.