inefficacious

pronunciation

How to pronounce inefficacious in British English: UK [ˌɪnefɪ'keɪʃəs]word uk audio image

How to pronounce inefficacious in American English: US [ˌɪnefə'keɪʃəs] word us audio image

  • Adjective:
    lacking the power to produce a desired effect

Word Origin

inefficacious (adj.)
1650s, from in- (1) "not, opposite of" + efficacious. Related: Inefficaciously; inefficaciousness (1640s).

Example

1. Fundamentally , it consists in the view that mental phenomena are causally inefficacious .
2. Clinical study on treatment of chronic hepatitis b with combination of thymosin and hepatitis b vaccine , which using interferon inefficacious .
3. When other modalities become inefficacious , argon-helium knife still can get very good results .

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