retroactive的词源

英文词源

retroactive (adj.)youdaoicibaDictYouDict
1610s, from French rétroactif (16c.) "casting or relating back," from Latin retroact-, past participle stem of retroagere "drive or turn back," from retro- "back" (see retro-) + agere "to drive, set in motion" (see act (v.)). Related: Retroactively.

中文词源

retroactive:有追溯力的

retro-,向后,往回,active,有效力的。

该词的英语词源请访问找单词词源英文版:retroactive 词源,retroactive 含义。