noun
- the quality or state of being unable to produce a desired effect; lack of effectiveness
Usage: formal
Examples
- The inefficacy of the new policy became apparent after six months.
- Doctors were frustrated by the inefficacy of traditional treatments for the rare disease.
- The study demonstrated the inefficacy of the proposed solution.
- Budget cuts led to the inefficacy of several government programs.
- The inefficacy of his arguments failed to convince the jury.
- Researchers are investigating the inefficacy of certain antibiotics against resistant bacteria.