Definition of inefficacy in English:

inefficacy

Pronunciation /inˈefikəsē/ /ɪnˈɛfɪkəsi/

noun

  • Failure to produce the desired effect.

    ‘doctors were lampooned for the inefficacy of their cures’
    ‘market inefficacies’

Pronunciation

inefficacy

/inˈefikəsē/ /ɪnˈɛfɪkəsi/