memoir (n.)youdaoicibaDictYouDict[memoir 词源字典]
early 15c., "written record," from Anglo-French memorie "note, memorandum, something written to be kept in mind" (early 15c., Old French memoire), from Latin memoria (see memory). Meaning "person's written account of his life" is from 1670s.[memoir etymology, memoir origin, 英语词源]