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ลองค้นหาคำในรูปแบบอื่นๆ เพื่อให้ได้ผลลัพธ์มากขึ้นหรือน้อยลง: -inefficacious-, *inefficacious*, inefficaciou
English-Thai: NECTEC's Lexitron-2 Dictionary [with local updates]
inefficacious    [ADJ] ซึ่งไม่มีประโยชน์, See also: ซึ่งไม่ได้ผล, Syn. powerless, ineffectual, ineffective

English-Thai: HOPE Dictionary [with local updates]
inefficacious(อินเอฟฟะเค'เชิส) adj. ไม่ได้ผล,ไม่ได้ผลเป็นที่พอใจ., See also: inefficaciousness,inefficacity n., Syn. useless,vain

English-Thai: Nontri Dictionary
inefficacious(adj) ไม่ชะงัด,ไม่เป็นผลดี

Result from Foreign Dictionaries (2 entries found)

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Inefficacious \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.
     [1913 Webster]
           The authority of Parliament must become inefficacious .
           . . to restrain the growth of disorders. --Burke.
     [1913 Webster]
     Note: Ineffectual, says Johnson, rather denotes an actual
           failure, and inefficacious an habitual impotence to any
           effect. But the distinction is not always observed, nor
           can it be; for we can not always know whether means are
           inefficacious till experiment has proved them
           ineffectual. Inefficacious is therefore sometimes
           synonymous with ineffectual.
           [1913 Webster]

From WordNet (r) 3.0 (2006) [wn]:

      adj 1: lacking the power to produce a desired effect; "laws that
             are inefficacious in stopping crime" [ant: {efficacious}]

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