foolish
Americanadjective
-
resulting from or showing a lack of sense; ill-considered: unwise.
a foolish action;
a foolish speech.
- Synonyms:
- thoughtless, imprudent, preposterous, nonsensical, absurd, ridiculous, unintelligent, senseless, brainless, witless, stupid
-
lacking forethought or caution.
- Synonyms:
- thoughtless, imprudent, incautious, heedless, half-baked, foolhardy, reckless, rash, impetuous
-
trifling, insignificant, or paltry.
adjective
-
unwise; silly
-
resulting from folly or stupidity
-
ridiculous or absurd; not worthy of consideration
-
weak-minded; simple
-
an archaic word for insignificant
Usage
What are other ways to say foolish? A foolish action is one that shows a lack of sense or is ill-considered. How is foolish different from fatuous, silly, inane, stupid, and asinine? Find out on Thesaurus.com.
Other Word Forms
- foolishly adverb
- foolishness noun
- overfoolish adjective
- overfoolishly adverb
- quasi-foolish adjective
- quasi-foolishly adverb
- unfoolish adjective
- unfoolishly adverb
Etymology
Origin of foolish
First recorded in 1250–1300; from Middle English folish, foolish; fool 1, -ish 1
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.
Ye ended the show with “All of the Lights,” which got a huge pryo display, and “Runaway,” his epic 2010 warning to anyone foolish enough to consider falling in love with him.
From Los Angeles Times • Apr. 2, 2026
Go through the account activity together, framing it as a routine check rather than accusing him of being foolish or incompetent.
From MarketWatch • Mar. 23, 2026
It would be foolish to make confident predictions about what will happen in this war, except to say that nearly all potential outcomes are likely to create much bigger problems down the road.
From Salon • Mar. 8, 2026
Of course, investors would be foolish to draw major conclusions from a few weeks of performance.
From Barron's • Mar. 5, 2026
"Don't be foolish," his mom's voice said, but it sounded very nervous.
From "All About Sam" by Lois Lowry
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.
