Definition of inefficacious in English:

inefficacious

adjective

  • Not producing the desired effect.

    • ‘But though it is not absolutely efficacious under all circumstances, it is of great potency always, and rarely inefficacious.’
    • ‘The ambitious but inefficacious poor soul has tried his best.’
    • ‘Then I just started wittering in a pretty inefficacious way at the Carribean customer service woman.’
    • ‘Several writers argue that terrorism is generally inefficacious, strategically counterproductive and unsuccessful in attaining socio-political objectives.’
    • ‘Functionalism certainly does not imply that the mind is inefficacious.’
    fruitless, vain, pointless
    View synonyms

Pronunciation:

inefficacious

/ˈinefiˈkāSHəs/