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in-efficient
adjective as in incompetent
Strongest matches
adjective as in ineffective/ineffectual
Weak matches
- abortive
- anticlimactic
- barren
- bootless
- defeasible
- feckless
- feeble
- forceless
- fruitless
- futile
- idle
- impotent
- inadequate
- incompetent
- indecisive
- inefficacious
- inefficient
- inept
- inferior
- innocuous
- inoperative
- invertebrate
- lame
- limited
- neutralized
- nugatory
- null
- null and void
- paltry
- powerless
- spineless
- unable
- unavailing
- unfruitful
- unproductive
- unprofitable
- unsuccessful
- vain
- void
- withered
- worthless
adjective as in inefficient
adjective as in inept
adjective as in lame
Strongest matches
adjective as in unable
adjective as in unfit
Strongest matches
adjective as in unprofessional
adjective as in ineffective
Strongest matches
adjective as in ineffectual
adjective as in inefficacious
Weak matches
- abortive
- anticlimactic
- barren
- bootless
- defeasible
- feckless
- feeble
- forceless
- fruitless
- futile
- idle
- impotent
- inadequate
- incompetent
- indecisive
- ineffective
- inefficient
- inept
- inferior
- innocuous
- inoperative
- invertebrate
- lame
- limited
- neutralized
- nugatory
- null
- null and void
- paltry
- powerless
- spineless
- unable
- unavailing
- unfruitful
- unproductive
- unprofitable
- unsuccessful
- useless
- vain
- void
- withered
- worthless
adjective as in feeble
Strongest matches
Weak matches
- aged
- chicken
- debilitated
- delicate
- doddering
- dopey
- effete
- emasculated
- enervated
- enfeebled
- epicene
- etiolated
- exhausted
- failing
- faint
- flat
- gentle
- helpless
- impotent
- inadequate
- indecisive
- ineffectual
- insubstantial
- insufficient
- languid
- low
- out of gas
- poor
- powerless
- sapless
- slight
- strengthless
- thin
- unconvincing
- vitiated
- weakly
- wimpy
- woozy
- zero
adjective as in helpless
Strongest matches
Strong matches
adjective as in incompetent
Strongest matches
adjective as in ineffective/ineffectual
Weak matches
- abortive
- anticlimactic
- barren
- bootless
- defeasible
- feckless
- feeble
- forceless
- fruitless
- futile
- idle
- impotent
- inadequate
- incompetent
- indecisive
- inefficacious
- inefficient
- inept
- inferior
- innocuous
- inoperative
- invertebrate
- lame
- limited
- neutralized
- nugatory
- null
- null and void
- paltry
- powerless
- spineless
- unable
- unavailing
- unfruitful
- unproductive
- unprofitable
- unsuccessful
- vain
- void
- withered
- worthless
adjective as in inefficient
adjective as in inept
adjective as in lame
Strongest matches
adjective as in unable
adjective as in unfit
Strongest matches
adjective as in unprofessional
adjective as in ineffective
Strongest matches
adjective as in ineffectual
adjective as in inefficacious
Weak matches
- abortive
- anticlimactic
- barren
- bootless
- defeasible
- feckless
- feeble
- forceless
- fruitless
- futile
- idle
- impotent
- inadequate
- incompetent
- indecisive
- ineffective
- inefficient
- inept
- inferior
- innocuous
- inoperative
- invertebrate
- lame
- limited
- neutralized
- nugatory
- null
- null and void
- paltry
- powerless
- spineless
- unable
- unavailing
- unfruitful
- unproductive
- unprofitable
- unsuccessful
- useless
- vain
- void
- withered
- worthless
adjective as in feeble
Strongest matches
Weak matches
- aged
- chicken
- debilitated
- delicate
- doddering
- dopey
- effete
- emasculated
- enervated
- enfeebled
- epicene
- etiolated
- exhausted
- failing
- faint
- flat
- gentle
- helpless
- impotent
- inadequate
- indecisive
- ineffectual
- insubstantial
- insufficient
- languid
- low
- out of gas
- poor
- powerless
- sapless
- slight
- strengthless
- thin
- unconvincing
- vitiated
- weakly
- wimpy
- woozy
- zero
adjective as in helpless
Strongest matches
Strong matches
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On this page you'll find 562 synonyms, antonyms, and words related to in efficient, such as: amateurish, helpless, inadequate, incapable, ineffectual, and inefficient.
From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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