This is the 1509th most frequent Portuguese word.
eficiente
Efficient: Performing tasks effectively with minimal waste of time or effort.
The word 'eficiente' is used here to describe someone who performs their tasks effectively and with high productivity.
Ela é uma profissional muito eficiente no trabalho.
She is a very efficient professional at work.
In this context, 'eficiente' modifies 'aparelhos', meaning these appliances consume less energy while maintaining performance.
Para economizar energia, temos que usar aparelhos mais eficientes.
To save energy, we need to use more efficient appliances.
Here, 'eficiente' describes the study method's capability to achieve great results with minimal effort or time.