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Definition of infeasible

infeasible

/ɪnˈfiː.zə.bəl/
in · fea · si · ble
Adverb:infeasibly
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infeasible Lexical Profile

infeasible Game Scores & Validity

• adjective

1

Not possible to do easily or conveniently; impracticable or unworkable under existing conditions.

Example

"Expanding the subway line across the mountain range proved economically infeasible due to the unstable rock formations."

Synonyms
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Antonyms
View all antonyms for infeasible

Word Nuance & Usage

"Infeasible" and "unfeasible" are interchangeable in modern English, though "infeasible" is preferred in technical, mathematical, and economic contexts (such as an "infeasible solution" in linear programming).

• Rhymes for infeasible

• Nearby Words

infatuate
infatuated
infatuation
infeasible
infect
infection
infectious

Word Origin & Etymology

Formed in the 16th century from the negative prefix "in-" and "feasible," which derives from Anglo-French "faisible" (capable of being done), ultimately from Latin "facere" (to do or make).

Cite this Entry

Wordmom. (2026). Definition of Infeasible. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/infeasible
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