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Antonyms
Efficient device

Meaning Synonyms Antonyms Rhymes Sentences Translate Word Type Pronunciation Word Forms

Efficient device

Antonyms for "efficient device" (1 found)

Noun(1 words)

energy waste

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Source note: This entry is assembled from open lexical datasets and WordToolSet editorial checks. See our data sources and editorial policy. Last reviewed May 2026.

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