eficacia înseamnă în Engleză

effectiveness [effectivenesses]▼(capacity or potential)
noun
[UK: ɪ.ˈfekt.ɪv.nəs] [US: ɪ.ˈfekt.ɪv.nəs]Don't doubt the effectiveness of this drug. = No dude de la eficacia de este medicamento.

efficacy [efficacies]▼(ability to produce effect)
noun
[UK: ˈe.fɪk.ə.si] [US: ˈe.fɪˌk.æ.si]Don't confuse efficacy with efficiency. = No confundas eficacia con eficiencia.

ineffectiveness▼(condition of being ineffective)
noun
[UK: ˌɪ.nɪ.ˈfek.tɪv.nəs] [US: ˌɪ.nə.ˈfek.tɪv.nəs]