enema (n.)youdaoicibaDictYouDict[enema 词源字典]
early 15c., via Medieval Latin, from Greek enema "injection," from enienai "to send in, inject," from en "in" (see en- (2)) + hienai "send" (cognate of Latin iacere; see jet (v.)).[enema etymology, enema origin, 英语词源]