Definitions

infeasible

[in-fee-zuh-buhl] / ɪnˈfi zə bəl /

ADJECTIVE

impossible

Synonyms

STRONGEST

absurd futile hopeless impassable impractical inaccessible inconceivable insurmountable preposterous unattainable unimaginable unreasonable unthinkable unworkable useless

STRONG

visionary

WEAK

beyond contrary to reason cureless hardly possible hundred-to-one impervious impracticable inexecutable irrealizable irreparable no-go no-win not a prayer out of the question too much unachievable uncorrectable unfeasible unobtainable unrecoverable way-out

Antonyms

STRONGEST

believable conceivable hopeful imaginable logical practical reasonable sensible

WEAK

achievable obtainable possible

ADJECTIVE

impracticable

Synonyms

WEAK

impossible imprudent insuperable unfeasible unwise

Antonyms

WEAK

practicable

ADJECTIVE

impractical

Synonyms

STRONGEST

absurd illogical impossible improbable quixotic speculative unattainable unreal unusable unwise unworkable useless

WEAK

abstract chimerical idealistic impracticable inapplicable inefficacious inoperable ivory-tower no-go nonfunctional nonviable otherworldly romantic starry-eyed theoretical unbusinesslike unfeasible unserviceable visionary wild won't fly

Antonyms

STRONGEST

logical possible rational reasonable sensible tenable

WEAK

practical

ADJECTIVE

impractical/impracticable

Synonyms

STRONGEST

impossible improbable unfeasible unworkable

WEAK

abstract absurd chimerical idealistic illogical inapplicable inefficacious inoperable irrealizable ivory tower no-go nonfunctional nonviable not a prayer otherworldly out of the question quixotic romantic speculative starry-eyed theoretical unattainable unbusinesslike unreal unserviceable unusable unwise useless visionary wild won't fly

Antonyms

WEAK

practicable practical probable realistic reasonable tenable viable

ADJECTIVE

unattainable

Synonyms

STRONGEST

futile hopeless impassable impervious impractical inaccessible inconceivable insurmountable unimaginable unreasonable unthinkable unworkable useless

WEAK

absurd beyond contrary to reason cureless hardly possible hundred-to-one impracticable inexecutable irrealizable irreparable no-go no-win not a prayer out of the question preposterous too much unachievable uncorrectable unfeasible unobtainable unrealizable unrecoverable visionary way-out

Antonyms

STRONGEST

believable conceivable hopeful imaginable open practical reasonable sensible

ADJECTIVE

unnegotiable

Synonyms

WEAK

abstract absurd chimerical idealistic illogical impossible impractical improbable inapplicable inefficacious inoperable irrealizable ivory-tower no-go nonfunctional nonviable not a prayer otherworldly out of the question quixotic romantic speculative starry-eyed theoretical unattainable unbusinesslike unfeasible unreal unserviceable unusable unwise unworkable useless visionary wild won't fly

ADJECTIVE

unrealizable

Synonyms

WEAK

absurd beyond contrary to reason cureless futile hardly possible hopeless hundred-to-one impassable impervious impracticable impractical inaccessible inconceivable inexecutable insurmountable irrealizable irreparable no-go no-win not a prayer out of the question preposterous too much unachievable unattainable uncorrectable unfeasible unimaginable unobtainable unreasonable unrecoverable unthinkable unworkable useless visionary way-out

ADJECTIVE

unusable

Synonyms

STRONGEST

impractical inoperable unattainable unworkable useless

WEAK

abstract absurd chimerical idealistic illogical impossible improbable inapplicable inefficacious irrealizable ivory-tower no-go nonfunctional nonviable not a prayer otherworldly out of the question quixotic romantic speculative starry-eyed theoretical unbusinesslike unfeasible unnegotiable unreal unwise visionary wild won't fly

ADJECTIVE

unworkable

Synonyms

STRONGEST

absurd illogical impossible impractical unattainable unusable useless

WEAK

abstract chimerical idealistic improbable inapplicable inefficacious inoperable irrealizable ivory-tower no-go nonfunctional nonviable not a prayer otherworldly out of the question quixotic romantic speculative starry-eyed theoretical unbusinesslike unfeasible unnegotiable unreal unserviceable visionary wild won't fly

Antonyms

STRONGEST

logical rational reasonable sensible

ADJECTIVE

unworkable

Synonyms

STRONGEST

absurd futile impassable impractical unattainable unreasonable unthinkable useless

WEAK

beyond contrary to reason cureless hardly possible hopeless hundred-to-one impervious impracticable inaccessible inconceivable inexecutable insurmountable irrealizable irreparable no-go no-win not a prayer out of the question preposterous too much unachievable uncorrectable unfeasible unimaginable unobtainable unrealizable unrecoverable visionary way-out

Antonyms

STRONGEST

logical practical reasonable sensible

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He insists that a June 5 invasion will fail because of high waves and low clouds that would make air support infeasible.

From The Wall Street Journal • May 28, 2026

Instead, they said that market and financial conditions had changed, rendering the plans infeasible, according to a letter sent by Ofland’s attorney to the city of Twentynine Palms last week.

From Los Angeles Times • Apr. 30, 2026

The FDA already requires randomized controlled trials prior to approving vaccines and most medicines—except when they would be unethical or infeasible, as is the case for rare diseases and terminal cancers.

From The Wall Street Journal • Dec. 3, 2025

However, simple implementations tend to suggest excessively thick films or infeasible deposition conditions.

From Science Daily • Mar. 5, 2024

Note that Arrow adopts feasibility, but also wants to impose infeasible conditions.

From Definition & Reality in the General Theory of Political Economy by Colignatus, Thomas

infeasible

Example Sentences

Related Words