im-Wiktionary 原文1词源 1演变路径（由近及远）英语源自 ←拉丁语 im-继承自 ←原始意大利语族语 *n̥-继承自 ←原始印欧语 *n̥-词源说明From Latin im-, assimilated form of in- used before b-/p-/m-.释义（英文）前缀 PrefixExpressing negation; not.2词源 2演变路径（由近及远）英语源自 ←古法语 em-源自 ←中古法语 im-词源说明From em-, from Old French em-. Also from later Middle French im-, partly by confusion with im- of Latin origin (on which see above).释义（英文）前缀 PrefixAlternative form of the prefix em-, itself variant of en-.