B2 noun Neutral

eficacia

/efiˈkaθja/

The ability to produce a desired or intended result. It measures how successful something is in achieving its goals.

Examples

3 of 5
1

Necesito limpiar esto con más eficacia.

I need to clean this with more efficacy.

2

La eficacia administrativa es vital para el gobierno.

Administrative efficacy is vital for the government.

3

Tu truco no tiene mucha eficacia.

Your trick doesn't have much efficacy.

Word Family

Noun
eficacia
Adverb
eficazmente
Adjective
eficaz
💡

Memory Tip

Efficacy starts with 'E' for 'Effect'.

Quick Quiz

El director cuestionó la ___ del plan actual.

Correct!

The correct answer is: eficacia

Examples

1

Necesito limpiar esto con más eficacia.

everyday

I need to clean this with more efficacy.

2

La eficacia administrativa es vital para el gobierno.

formal

Administrative efficacy is vital for the government.

3

Tu truco no tiene mucha eficacia.

informal

Your trick doesn't have much efficacy.

4

El estudio comparó la eficacia de ambos métodos de enseñanza.

academic

The study compared the efficacy of both teaching methods.

5

Buscamos mejorar la eficacia operativa de la planta.

business

We seek to improve the operational efficacy of the plant.

Word Family

Noun
eficacia
Adverb
eficazmente
Adjective
eficaz

Common Collocations

eficacia probada proven efficacy
perder eficacia to lose efficacy
máxima eficacia maximum efficacy
eficacia simbólica symbolic efficacy
comprobar la eficacia to check the efficacy

Common Phrases

con eficacia

with efficacy

falta de eficacia

lack of efficacy

eficacia a corto plazo

short-term efficacy

Often Confused With

eficacia vs eficiencia

Eficacia is reaching the goal; eficiencia is reaching the goal using the minimum resources.

📝

Usage Notes

Common in scientific and business contexts to describe performance.

⚠️

Common Mistakes

Using 'eficiencia' when you specifically mean 'getting the result done' regardless of cost.

💡

Memory Tip

Efficacy starts with 'E' for 'Effect'.

📖

Word Origin

From Latin 'efficacia', from 'efficax'.

Grammar Patterns

eficacia de + sustantivo tener eficacia

Quick Quiz

El director cuestionó la ___ del plan actual.

Correct!

The correct answer is: eficacia

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