inefficacious

  • 1Inefficacious — In*ef fi*ca cious, a. [Pref. in not + efficacious: cf. F. inefficace, L. inefficax.] Not efficacious; not having power to produce the effect desired; inadequate; incompetent; inefficient; impotent. Boyle. [1913 Webster] The authority of… …

    The Collaborative International Dictionary of English

  • 2inefficacious — [in΄ef i kā′shəs] adj. not efficacious; unable to produce the desired effect [an inefficacious medicine] inefficaciously adv. inefficaciousness n …

    English World dictionary

  • 3inefficacious — index defunct, disabled (made incapable), futile, inadept, inadequate, ineffective, ineffectual, inept ( …

    Law dictionary

  • 4inefficacious — (adj.) 1650s, from IN (Cf. in ) (1) not, opposite of + EFFICACIOUS (Cf. efficacious). Related: Inefficaciously; inefficaciousness (1640s) …

    Etymology dictionary

  • 5inefficacious — ineffective, ineffectual, inefficient Analogous words: inactive, inert, idle: *futile, vain, fruitless, bootless, abortive: *powerless, impotent Antonyms: efficacious Contrasted words: *powerful, potent, forcible, forceful: cogent, telling,… …

    New Dictionary of Synonyms

  • 6inefficacious — adjective Date: 1658 lacking the power to produce a desired effect ; ineffective • inefficaciously adverb • inefficaciousness noun …

    New Collegiate Dictionary

  • 7inefficacious — inefficaciously, adv. inefficaciousness, inefficacity /in ef i kas i tee/, n. /in ef i kay sheuhs/, adj. not able to produce the desired effect; ineffective. [1650 60; IN 3 + EFFICACIOUS] * * * …

    Universalium

  • 8inefficacious — adjective a) incapable of having the intended consequence b) not effective Syn: ineffective …

    Wiktionary

  • 9inefficacious — (Roget s Thesaurus II) adjective Not having the desired effect: ineffective, ineffectual, inefficient, useless. See AFFECT …

    English dictionary for students

  • 10inefficacious —  A longer way of saying ineffective …

    Bryson’s dictionary for writers and editors