IELTS Anvil

efficient

CEFR: B1

Achieving maximum productivity with minimum wasted electrical energy, fuel, expense, or human effort.

Synonyms

cost-effective
streamlined
expeditious

Common Collocations

energy-efficient
cost-efficient
highly efficient

Example Sentence

LED lighting systems are remarkably more energy-efficient than incandescent filaments, converting ninety percent of electrical energy into light.

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