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   efficacious

   /ˌɛfɪˈkeɪʃəs/

   adjective

   • 1. (of something inanimate or abstract) successful in producing a desired or intended result; effective: formal "this treatment was efficacious in some cases"

   Word Origin early 16th century: from Latin efficax, efficac- (from efficere ‘accomplish’: see effect) + -ious.

   Derivatives

   • 1. efficaciously adverb
   • 2. efficaciousness noun

   Scrabble Points: 21

   • E

     1

   • F

     4

   • F

     4

   • I

     1

   • C

     3

   • A

     1

   • C

     3

   • I

     1

   • O

     1

   • U

     1

   • S

     1

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