energy-efficient
UK: ˈenədʒi ɪˈfɪʃənt | US: ˈenərdʒi ɪˈfɪʃənt
adj. designed to use less energy while maintaining performance
adj. achieving maximum output with minimal energy waste
The term combines "energy," derived from Greek energeia (activity, force), and "efficient," from Latin efficere (to accomplish). "Energy-efficient" emerged in the mid-20th century, reflecting technological advancements prioritizing reduced energy consumption without sacrificing functionality. The hyphenated form preserves clarity in compound adjectives.
The new office building uses energy-efficient lighting to cut costs.
Energy-efficient appliances often qualify for government rebates.
Architects prioritize energy-efficient designs to meet sustainability goals.
This car model is praised for its energy-efficient engine.
Homeowners can save money by installing energy-efficient windows.