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.
Achieving such reductions would have been costly and technically 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
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
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.
