Meaning
effectiveness
- efficacy
In a sentence
Questo metodo ha mostrato grande efficacia nel tempo.
This method has shown great effectiveness over time.
Secondo te, questa crema ha davvero efficacia?
Do you think this cream is really effective?
Il piano non ha avuto molta efficacia ieri.
The plan wasn't very effective yesterday.
Word forms (2)
| Word | Word forms |
|---|---|
| efficacia | feminine · singular |
| efficacie | feminine · plural |
Usage notes
- Common in formal, academic, medical, and technical contexts; in everyday speech, risultato or funziona often sounds more natural.
- Use with di to name what works: efficacia di un farmaco, di una strategia. Not usually followed directly by an infinitive.
- Distinguish from efficienza: efficacia is achieving the goal; efficienza is doing it with minimal time, effort, or cost.