efficace
effective
adjective ehf-fee-KAH-cheh Less Common
Origin: from Latin 'efficax', effective
Usage Note
Efficace describes a thing or method that works (a remedy, a strategy), whereas efficiente describes a person or system that works without waste, a distinction English blurs. It ends in -e, so the plural for both genders is efficaci.
Examples
"È un rimedio molto efficace."
Natural Translation
It's a very effective remedy.
Literal Translation
It-is a remedy very effective.

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