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Definition of unfeasible

unfeasible

/ʌnˈfiːzəbəl/
un · fea · si · ble
Adverb:unfeasibly
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unfeasible Lexical Profile

unfeasible Game Scores & Validity

• adjective

1

Incapable of being done, carried out, or achieved successfully; impractical or unworkable.

Example

"Expanding the railway line through the mountain range proved economically unfeasible due to the unstable terrain."

Synonyms
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Antonyms
View all antonyms for unfeasible

Word Nuance & Usage

"Unfeasible" and "infeasible" are interchangeable in meaning; however, "infeasible" is generally preferred in American English and technical writing, whereas "unfeasible" is more common in British English.

• Rhymes for unfeasible

• Nearby Words

unfazed
unfeared
unfeasibility
unfeasible
unfeasibly
unfeathered
unfed

Word Origin & Etymology

Formed in English during the 16th century by adding the native prefix "un-" (meaning "not") to "feasible," which derives from Anglo-French "fesable" and ultimately from Latin "facere" (to do or make).

Cite this Entry

Wordmom. (2026). Definition of Unfeasible. In Wordmom Dictionary. Retrieved Nov 3, 2026, from https://wordmom.com/dictionary/unfeasible
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