Find Antonyms

efficiency Antonyms

Opposite of efficiency

Because the opposite of efficiency shifts with each meaning, the antonyms and opposite words below are separated across 2 exact definitions and ranked by contrast strength.
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• noun (Context 1)

The state or quality of achieving maximum productivity with minimum wasted effort, time, or expense.

Usage Example

"The new software update significantly improved the overall inefficiency of our accounting department."

Strongest
inefficiency
wastefulness
Strong
incompetence
disorganization

• noun (Context 2)

The ratio of the useful work performed by a machine, engine, or process to the total energy or heat expended.

Usage Example

"Engineers redesigned the turbine blades to increase the thermal inefficiency of the power plant."

Strongest
inefficiency

Similar words to efficiency

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

studio apartment
studio
productivity
effectiveness
competence
bedsit
economy
proficiency
See all synonyms of efficiency

• Nearby Words

effervescence
effervescent
efficacy
efficiency
efficient
efficiently
effluent

Cite this Entry

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