- efficient
[efficient 词源字典]
- efficient: see effect
[efficient etymology, efficient origin, 英语词源] - efficient (adj.)
- late 14c., "making, producing immediate effect, active, effective," from Old French efficient and directly from Latin efficientem (nominative efficiens) "effective, efficient, producing, active," present participle of efficere "work out, accomplish" (see effect). Meaning "productive, skilled" is from 1787. Related: Efficiently.