| efficacy | (n) capacity or power to produce a desired effect, Syn. efficaciousness, Ant. inefficacy, Example: concern about the safety and efficacy of the vaccine |
| inefficacy | (n) a lack of efficacy, Syn. inefficaciousness, Ant. efficacy |
| efficaciousness | n. the capacity or power to produce a desired effect. |
| Inefficaciousness | n. Lack of effect, or of power to produce the effect; inefficacy. [ 1913 Webster ] |
| Wirksamkeitf { f } | efficaciousness [Add to Longdo] |