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Showing results for infeasible. Search instead for infeasibi.
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.

In these cases, no randomized trial will be required because it’s simply infeasible.

From The Wall Street Journal • Feb. 23, 2026

Smith, speaking to The Times, stressed that the new guidelines only apply to situations where the Fire Department has deemed evacuations infeasible.

From Los Angeles Times • Nov. 24, 2025

Next, the post-processing method transforms the infeasible solutions into feasible ones, leaving the probability distribution with only feasible solutions.

From Science Daily • Mar. 25, 2024

It’s incredible progress on a task that was thought infeasible just a few years ago, says Aditya Grover, an AI researcher at the University of California, Los Angeles.

From Science Magazine • Nov. 14, 2023

He sought to talk discontentedly of the project, as if he found it infeasible.

From The Story of Old Fort Loudon by Murfree, Mary Noailles