ef·fi·ca·cious ( f  -k  sh s)adj. Producing or capable of producing a desired effect. See Synonyms at effective. [From Latin effic x, efficc-, from efficere, to effect; see effect.]ef fi·cacious·ly adv.ef fi·cacious·ness n. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Adv. | 1. | efficaciously - in an effective manner; "these are real problems that can be dealt with most effectively by rational discussion" ineffectively, inefficaciously - in an ineffective manner; "he dealt with the problem rather ineffectively" |
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