Yahoo Web Search

Search results

1. Dictionary

   Ef·fi·ca·cious

   /ˌefəˈkāSHəs/

   

   adjective

   • 1. (of something inanimate or abstract) successful in producing a desired or intended result; effective: formal "the vaccine has proved both efficacious and safe"

   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

   Powered by Oxford Languages

   More Definitions, Word Origin & ScrabbleShow less