superefficient
/ˌsupərɪˈfɪʃənt/
adjective
- Extremely efficient; achieving maximum productivity with minimum wasted effort or resources.
- A superefficient engine can travel twice as far on the same amount of fuel.
- Her superefficient filing system saves the office hours of work every week.
- The new solar panels are superefficient, converting nearly all sunlight into electricity.
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