unfeasible

British  

/ ʌnˈfiːzəbəl /

adjective

1. not able to be done or put into effect; impossible

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Explanation

Something that's unfeasible just won't work, no matter what you try. You might decide after many attempts that fitting a sofa into the trunk of your car is unfeasible. Use the adjective unfeasible to describe things that are impossible. Your plans to travel around the world might turn out to be unfeasible if you haven't saved enough money. It's also unfeasible to get around many cities and towns without a car. The word's been around since the 1500's, a combination of the prefix un, or "not," and feasible, which means "possible" or "easy," from the Latin root facere, "do or make."

Example Sentences

On Saturday, a Lufthansa spokesman had called the demands from the pilots' union for higher pay and pensions "absurd and unfeasible".

From Barron's • Apr. 13, 2026

That wouldn’t be unfeasible for Intel, Arcuri said, especially if the company can get “material” prepayments from customers for chips built on its upcoming 14A process node.

From MarketWatch • Apr. 2, 2026

Service fees, delivery fees, tax and tips, combined with the astronomically high cost of food in New York City, made regular food delivery unfeasible.

From Salon • Mar. 3, 2026

"I've tried to say why Simion's plan is unfeasible but I don't think I've been super successful," Andrea admits, and says she's "very worried".

From BBC • May 18, 2025

But in many places this only works for a while, or it is economically unfeasible not to use the land for a year.

From "1491" by Charles C. Mann