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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," from assimilated form of ex "out" (see ex-) + facere "to do" (from PIE root *dhe- "to set, put"). Meaning "productive, skilled" is from 1787. Related: Efficiently.
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Definitions of efficient from WordNet
Dictionary entries near efficient
effervescent
effete
efficacious
efficacy
efficiency
efficient
effigy
effleurage
effloresce
efflorescence
efflorescent