Inefficacy and Necessity

Inefficacy noun - A lack of efficacy.

Necessity and inefficacy are semantically related. In some cases you can use "Necessity" instead a noun "Inefficacy".

Necessity noun - Something necessary, indispensable, or unavoidable.

Inefficacy and necessity are semantically related. Sometimes you can use "Inefficacy" instead a noun "Necessity".

Nearby Words: necessary, necessarily, necessitous