definitions

efficacious

[ ef-i-key-shuh s ]
/ ˌɛf ɪˈkeɪ ʃəs /
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adjective

capable of having the desired result or effect; effective as a means, measure, remedy, etc.: The medicine is efficacious in stopping a cough.

RELATED WORDS

finally, forcefully, completely, definitely, energetically, adequately, dramatically, productively, excellently, conclusively, capably, cogently, effectually, expertly, persuasively, tellingly

Nearby words

effervescence, effervescent, effervescent salt, effete, effetely, efficacious, efficaciously, efficacity, efficacy, efficiency, efficiency apartment

Origin of efficacious

1520–30; < Latin efficāci- (stem of efficāx) effectual. See efficient, -acious

Related forms

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for efficaciously

British Dictionary definitions for efficaciously

efficacious

/ (ˌɛfɪˈkeɪʃəs) /

adjective

capable of or successful in producing an intended result; effective as a means, remedy, etc

Derived Forms

efficaciously, adverbefficaciousness, noun

Word Origin for efficacious

C16: from Latin efficāx powerful, efficient, from efficere to achieve; see effect
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012