expeditious (adj.)youdaoicibaDictYouDict[expeditious 词源字典]
late 15c., expedycius "useful, fitting," from Latin expeditus "disengaged, ready, convenient, prompt; unfettered, unencumbered," past participle of expedire (see expedite). Meaning "speedy, speedily accomplished" is from 1590s. Related: Expeditiously; expeditiousness.[expeditious etymology, expeditious origin, 英语词源]