Inefficient synonyms and antonyms

ĭn'ĭ-fĭsh'ənt

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careless (related)
Marked by or resulting from lack of forethought or thoroughness:
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incapable
The definition of incapable is not having the ability, strength or legal qualification to do something.
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incompetent
Unable to make rational decisions, insane or otherwise cognitively impaired.
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wasteful (related)
Using more than is necessary; extravagant
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ineffective (related)
The definition of ineffective is something or someone that does not succeed at accomplishing or moving towards a goal.
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unreliable (related)
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unfitted
Not customized to fit, generic, off the rack.
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slack
Flowing or blowing with little speed:
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able (antonym)
Gifted with skill, intelligence, knowledge, or competence. [First attested in the mid 16th century.]
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unfit
Not fit, not having a good physical demeanor.
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clumsy
The definition of clumsy is someone or something that is shaped, made or moves awkwardly.
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fumbling
Wasteful
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inefficacious
Incapable of having the intended consequence.
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remiss
Careless in, or negligent about, attending to a task; lax in the performance of duty
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unprepared
Not equipped to meet a contingency.
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unproductive
(Economics) Adding nothing to exchangeable value.
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unskilled
Exhibiting a lack of skill; inexpert:
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inefficiency
The quality, condition, or fact of being inefficient.
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maladminister
To administer or manage inefficiently or dishonestly.
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efficient (antonym)
Acting or producing effectively with a minimum of waste, expense, or unnecessary effort:
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useful (antonym)
Having a beneficial use; serviceable:
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expert (antonym)
Characteristic of an expert.
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competent (antonym)
Adequate for the purpose
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capable (antonym)
Able and efficient; having the ability needed for a specific task; having the disposition to do something; permitting or being susceptible to something.
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inapt
Unapt; not apt; unsuitable; inept.
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inept
Wrong in a foolish and awkward way
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unskillful
(Obsolete) Ignorant.
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useless
(Colloquial, of a person) unable to do well at a particular task or thing. Useless is mildly insulting.
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ability (related)
Lacking the qualities, as efficiency or skill, required to produce desired results
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costly (related)
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expensive (related)
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inflexible (related)
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cumbersome (related)
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uneconomic (related)
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unsustainable (related)
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extravagant
Going beyond reasonable limits; excessive or unrestrained
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improvident
Not providing for the future; thriftless.
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slipshod
Careless or negligent:
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affect (related)
Not having the desired effect
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Find another word for inefficient. In this page you can discover 44 synonyms, antonyms, idiomatic expressions, and related words for inefficient, like: careless, incapable, incompetent, wasteful, ineffective, unreliable, unfitted, slack, able, disorganized and unfit.
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Inefficient Sentence Examples

  • We will radically improve the primitive, inefficient process that agriculture is today.

  • These systems are all inefficient for spontaneous respiration (Figure 4).

  • This is useful as too large a heater will be inefficient to run.

  • Tankless hot water heaters eliminate the need for energy inefficient water tanks.

  • Leaky windows, poor insulation, old water heaters and inefficient heating systems waste a lot of energy.

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Words near inefficient in the Thesaurus