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efectividad

effectiveness

noun eh-fehk-tee-bee-DAHD Rare

Also means

efficacy

Usage Note

Efectividad stresses the actual results achieved, whereas eficacia stresses the theoretical capacity to produce an effect — learners often use them interchangeably, but in formal or scientific writing the distinction matters. The adjective efectivo can also mean 'cash' (dinero en efectivo) in a completely unrelated sense.

Examples

"La efectividad del tratamiento fue comprobada."

Natural Translation

The effectiveness of the treatment was confirmed.

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