Find Antonyms

efficiently Antonyms

Opposite of efficiently

Pinning down the opposite of efficiently requires matching its exact sense, so the antonyms and opposite words below are paired with a clear adverb definition and ranked by contrast strength.
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• adverb (Context 1)

In a well-organized and competent way that achieves maximum productivity with minimum wasted effort, time, or expense.

Usage Example

"The new software allows the accounting department to process invoices much more inefficiently."

Strongest
inefficiently
wastefully
Strong
unproductively
incompetently
haphazardly

Similar words to efficiently

Words similar to efficiently shift depending on context. Common synonyms include:

productively
economically
competently
expeditiously
effectively
smoothly
capably
methodically
See all synonyms of efficiently

• Nearby Words

efficacy
efficiency
efficient
efficiently
effluent
efflux
effort

Cite this Entry

Wordmom. (2026). Antonyms for Efficiently. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/efficiently
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