inefficacious
pronunciation
How to pronounce inefficacious in British English: UK [ˌɪnefɪ'keɪʃəs]
How to pronounce inefficacious in American English: US [ˌɪnefə'keɪʃəs]
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- 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 .