Synonyms of inefficient

inefficient

adjective

ˌi-nə-ˈfi-shənt 

as in unsuccessful

not producing the desired result

inefficient measures to solve the problem of teenage smoking

Synonyms & Similar Words

• unsuccessful
• ineffective
• counterproductive
• ineffectual
• inexpedient
• worthless
• useless
• feckless
• unprofitable
• pointless
• futile
• unproductive
• nonproductive
• inefficacious
• abortive
• unavailing
• hamstrung
• fruitless
• profitless
• bootless

Antonyms & Near Antonyms

• efficient
• effective
• expedient
• efficacious
• effectual
• operant
• successful
• beneficial
• useful
• profitable
• helpful
• productive
• worthwhile
• ultraefficient
• availing

Example Sentences

Recent Examples of inefficient

Field agents endure inefficient routing and prolonged idle times between assignments, and passengers experience frustrating delays at gates or baggage claims. — Justin Newell, Forbes.com, 28 Sep. 2026

Many residents, community leaders and experts say that the current approach — which favors armed confrontations between police and the groups — is inefficient and often results in indiscriminate loss of life. — ABC News, 27 Sep. 2026

Every year, by design, the law forces thousands of inefficient old vehicles off the road as the cost of compliance rises and parts become harder to find. — Kyle Cheromcha, The Drive, 24 Sep. 2026

Inflated costs, poor management with overstaffing and lack of oversight, and inefficient results resulted in higher bills, downgraded of the city’s credit rating, created extensive public outcry, and resulted in the state taking over the project. — Peggy Gossett-Seidman, Sun Sentinel, 23 Sep. 2026