UnscrambleTheWord.coefficient
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Is efficient a Scrabble word?
Word Games
- Scrabble US/Canada (OTCWL) Yes
- Scrabble UK (SOWPODS) Yes
- Wordle No
- Words With Friends Yes
Scrabble US/Canada (OTCWL) 
Wordle 
Words With Friends What is the meaning of efficient?
Definition
adj (English)
1. (proscribed, old use) effective, efficaciousExamples: "Ye wake no more to anguish;‥ ye have borne The Chosen, the Destroyer!‥ soon his hand Shall strike the efficient blow; Soon shaking off your penal forms, shall ye, With songs of joy, amid the Eden groves, Hymn the Deliverer’s praise!"; "The Efficient Cause is that from which emanates the force that produces the Effect"proscribed
noun (English)
1. (obsolete) A cause; something that causes an effect.Examples: "Some are without efficient, as God; others without matter, as Angels […]."; "This implies, that something happens without a cause. If it should be said, that motive in this case is not the efficient of the action or doing — this is granted; but at the same time, for reasons already given, it is denied, that the man himself is the efficient cause of it."obsolete
Definition source: Wiktionary