infeasible
Americanadjective
adjective
Other Word Forms
Etymology
Origin of infeasible
Explanation
Infeasible things are impossible, or too complicated to actually be done. Your idea of staging a city-wide game of Capture the Flag is probably infeasible. After several frustrating attempts at walking your cat around the neighborhood on a leash, you might finally decide the idea is infeasible — it's just not going to work the way you imagined. When something is feasible, it's entirely possible. Feasible comes from the Old French faisable, "that may be done," from the Latin root facere, "to make or do." When you add the "not" prefix in-, you get infeasible.
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.
That proves infeasible when he realizes, amid heavy snowfall, that the first stretch, Massachusetts’ 34-mile Johnny Appleseed Trail, is not a forest path but a paved highway unsuitable for pedestrians.
From The Wall Street Journal ● May 26, 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
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
However, simple implementations tend to suggest excessively thick films or infeasible deposition conditions.
From Science Daily ● Mar. 5, 2024
Direct election of a President becomes quickly infeasible for the more advanced voting procedures.
From Definition & Reality in the General Theory of Political Economy by Colignatus, Thomas
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
