Synonyms for Inefficient:

• adj.

  •all (adjective)
  • inefficient.
  •feeble (adjective)
  • indecisive,
  • frail,
  • unconvincing,
  • in firm,
  • impotent,
  • low,
  • failing,
  • effete,
  • insufficient,
  • sickly,
  • ailing,
  • fragile,
  • doddering,
  • puny,
  • paltry,
  • out of gas,
  • delicate,
  • woozy,
  • flat,
  • weakened,
  • insubstantial,
  • Strengthless,
  • faint,
  • sapless,
  • emasculated,
  • weakly,
  • dopey,
  • poor,
  • enfeebled,
  • enervated,
  • tame,
  • exhausted,
  • wimpy,
  • thin,
  • helpless,
  • slight,
  • powerless,
  • infirm,
  • vitiated,
  • decrepit,
  • debilitated,
  • aged,
  • etiolated,
  • fainter,
  • gentle,
  • languid.
  •helpless (adjective)
  • forsaken,
  • over a barrel,
  • destitute,
  • pinned,
  • disabled,
  • tapped out,
  • friendless,
  • prostrate,
  • defenseless,
  • forlorn,
  • up creek without paddle,
  • abandoned,
  • Handcuffed,
  • tapped,
  • dependent,
  • unprotected,
  • basket-case,
  • with hands tied,
  • invalid,
  • exposed,
  • shiftless.
  •incompetent (adjective)
  • clumsy,
  • uninitiated,
  • awkward,
  • Floundering,
  • maladroit,
  • amateur,
  • raw,
  • ineligible,
  • inexperienced,
  • out to lunch,
  • amateurish,
  • bungling,
  • disqualified.
  •ineffective (adjective)
  • more slackspined,
  • most emasculate,
  • most slackspined,
  • in-effective,
  • more emasculate,
  • un available,
  • most slack spined,
  • slackspined,
  • slack-spined,
  • slack spined,
  • more slack-spined,
  • un-available,
  • most slack-spined,
  • more slack spined,
  • in effective.
  •ineffective/ineffectual (adjective)
  • spineless,
  • unprofitable,
  • inferior,
  • barren,
  • neutralized,
  • null and void,
  • withered,
  • bootless,
  • abortive,
  • unsuccessful,
  • feckless,
  • void,
  • limited,
  • innocuous,
  • null,
  • inoperative,
  • unfruitful,
  • invertebrate.
  •ineffectual (adjective)
  • in effectual,
  • in-effectual.
  •inefficacious (adjective)
  • in efficacious,
  • in-efficacious.
  •inefficient (adjective)
  • prodigal,
  • slipshod,
  • unprepared,
  • disorganized,
  • extravagant,
  • improficient,
  • sloppy,
  • weak,
  • untrained,
  • unqualified,
  • improvident,
  • shooting blanks,
  • slovenly,
  • half-baked,
  • careless.
  •inept (adjective)
  • gauche,
  • butterfingers,
  • loser,
  • bumbling,
  • artless,
  • Unapt,
  • ungraceful,
  • wooden,
  • halting.
  •inexpedient (adjective)
  • undesirable,
  • unsuitable,
  • unsatisfactory,
  • inconvenient,
  • delinquent,
  • disadvantageous,
  • mistimed,
  • untimely.
  •lame (adjective)
  • faltering,
  • flimsy.
  •unable (adjective)
  • out of commission,
  • hog-tied,
  • no can do,
  • Impuissant,
  • incapacitated.
  •unfit (adjective)
  • maladjusted,
  • Blundering,
  • bush league,
  • unpracticed,
  • heavy-handed.
  •unprofessional (adjective)
  • lax,
  • unethical,
  • improper,
  • negligent,
  • unworthy,
  • ignorant.

• n.

  •
  • faulty.
  •
  • incapable,
  • unproductive.
  •
  • ability.
  •
  • affect.
  •inefficient (noun)
  • uneconomical,
  • wasteful.

• Other synonyms:

  •
  • muddled,
  • toothless,
  • uninformative,
  • spent,
  • nonoperational,
  • small-time,
  • Overworked,
  • defective,
  • moribund,
  • defunct,
  • infertile,
  • unhelpful,
  • unworkmanlike,
  • outworn,
  • muted,
  • bum,
  • facile.
  •
  • paper,
  • dysfunctional,
  • lame,
  • cumbersome,
  • unproven,
  • unresponsive,
  • porous,
  • unskilled,
  • inoperable,
  • unreliable,
  • anemic,
  • unskillful,
  • bush-league,
  • paralyzed.
  •
  • inapt,
  • inactive,
  • temperamental.
  •
  • old.
  •
  • dead.

Paraphrases for Inefficient:

• Equivalence

  • Adjective
    ineffectual, ineffective.
  • Proper noun, singular
    ineffective.
  • Noun, singular or mass
    ineffective.

• Independent

  • Adjective
    inappropriate, efficiency, invalid, unworkable, useless, defective, fruitless, futile, effectiveness, flawed, bad, feeble, energy-efficient, incapable, vain.

• Other Related

  • Adjective
    incompetent, insufficient, inadequate, counterproductive, deficient, inept, wasteful, unprofitable, uneconomic, unsuccessful, cumbersome, toothless, unproductive, weak, cost-effective, unsatisfactory, unwieldy, dysfunctional.
  • Noun, singular or mass
    inefficiency.

Antonyms for Inefficient:

• adj.

  • all
    efficient.
  • feeble
    hearty, solid, powerful, healthy, effective, hardy, strong, sound.
  • helpless
    independent, skilled, enterprising, resourceful.
  • incompetent
    dexterous, proficient, skillful, experienced, adept.
  • ineffective/ineffectual
    effectual.
  • inefficient
    capable, expert, useful, competent, able.
  • inept
    adroit, fit.
  • lame
    satisfactory.
  • unable
    qualified, adequate, talented.
  • unfit
    ready, willing.
  • unprofessional
    professional.
  • Other antonyms:
    helpful, operant, profitable, worthwhile, beneficial, expedient, successful.

• Other antonyms:

  • n.
    thrifty.