efficacious

efficacious
index active, beneficial, cogent, competent, effective (efficient), functional, influential, politic, potent, powerful, practical, predominant, prevailing (having superior force), proficient, qualified (competent), sciential, sound, successful, valuable, viable

Burton's Legal Thesaurus. . 2006

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  • Efficacious — Ef fi*ca cious, a. [L. eficax, acis, fr. efficere. See {Effect}, n.] Possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law. Syn: See {Effectual}. {Ef fi*ca cious*ly}, adv.… …   The Collaborative International Dictionary of English

  • efficacious — [ef΄i kā′shəs] adj. [L efficax (gen. efficacis) < efficere, to bring to pass, accomplish (see EFFECT) + OUS] producing or capable of producing the desired effect; having the intended result; effective [an efficacious drug] SYN. EFFECTIVE… …   English World dictionary

  • efficacious — sure to have the desired effect (often of medicines), 1520s, from L. efficaci , stem of efficax (see EFFICACY (Cf. efficacy)) + OUS (Cf. ous). Related: Efficaciously; efficaciousness …   Etymology dictionary

  • efficacious — effectual, *effective, efficient Analogous words: potent, *powerful, puissant: cogent, telling, sound, convincing, compelling (see VALID) Antonyms: inefficacious: powerless …   New Dictionary of Synonyms

  • efficacious — [adj] efficient, productive active, adequate, capable, competent, effective, effectual, energetic, influential, operative, potent, powerful, puissant, serviceable, strong, successful, useful, virtuous; concepts 528,537 Ant. incapable,… …   New thesaurus

  • efficacious — ► ADJECTIVE formal ▪ effective. DERIVATIVES efficaciously adverb efficaciousness noun. ORIGIN from Latin efficere accomplish …   English terms dictionary

  • efficacious — effective, effectual, efficacious, efficient 1. All these words mean ‘having an effect’ of some kind, but with different applications and shades of meaning. Effective means ‘having a definite or desired effect’ that is actual rather than… …   Modern English usage

  • efficacious — [[t]e̱fɪke͟ɪʃəs[/t]] ADJ GRADED Something that is efficacious is effective. [FORMAL] The nasal spray was new on the market and highly efficacious. Syn: effective …   English dictionary

  • efficacious — adjective Etymology: Latin efficac , efficax, from efficere Date: 1528 having the power to produce a desired effect < an efficacious remedy > Synonyms: see effective • efficaciously adverb • efficaciousness noun …   New Collegiate Dictionary

  • efficacious — efficaciously, adv. efficaciousness, n. /ef i kay sheuhs/, adj. capable of having the desired result or effect; effective as a means, measure, remedy, etc.: The medicine is efficacious in stopping a cough. [1520 30; < L efficaci (s. of efficax)… …   Universalium

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