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Quick answer
"Eficiente" is an adjective which is often translated as "efficient", and "eficaz" is an adjective which is often translated as "effective". Learn more about the difference between "eficiente" and "eficaz" below.
eficiente(
eh
-
fee
-
syehn
-
teh
)
An adjective is a word that describes a noun (e.g. the big dog).
1. (effective)
a. efficient
Lorena es la empleada más eficiente en el departamento de mercadotecnia.Lorena is the most efficient employee in the marketing department.
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eficaz(
eh
-
fee
-
kahs
)
An adjective is a word that describes a noun (e.g. the big dog).
1. (producing a desired effect)
a. effective
Los investigadores esperan descubrir un tratamiento más eficaz para la diabetes.Researchers hope to discover a more effective treatment for diabetes.
2. (not wasteful)
a. efficient
Estamos desarrollando un proceso de producción de electricidad más eficaz.We are developing a more efficient process of producing electricity.
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