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capricious

American  
[kuh-prish-uhs, -pree-shuhs] / kəˈprɪʃ əs, -ˈpri ʃəs /

adjective

  1. subject to, led by, or indicative of a sudden, odd notion or unpredictable change; erratic.

    He's such a capricious boss I never know how he'll react.

    Synonyms:
    mercurial, flighty, variable
    Antonyms:
    consistent, constant, steady
  2. Obsolete. fanciful or witty.


capricious British  
/ kəˈprɪʃəs /

adjective

  1. characterized by or liable to sudden unpredictable changes in attitude or behaviour; impulsive; fickle

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Synonym Usage

See fickle.

Other Word Forms

Etymology

Origin of capricious

First recorded in 1585–95; from French capricieux, from Italian capriccioso capriccioso

Explanation

Capricious is an adjective to describe a person or thing that's impulsive and unpredictable, like a bride who suddenly leaves her groom standing at the wedding altar. You can criticize a fickle-minded person as capricious, but it could just as well describe quickly changing weather, as in "capricious spring storms." It's the adjective form of the noun caprice, which means a sudden change of mood. Caprice might come from capra, the Italian word for "goat" (because goats are frisky), or from capo, "head" + riccio, "hedgehog." Why bring hedgehogs into it? If you have a "hedgehog head," you are so scared that your hair is standing straight on end. A scared person makes sudden starts this way and that, just as a capricious person does.

Keep Reading on Vocabulary.com

Vocabulary lists containing capricious

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.

See Examples For:

You really see this change, and yet it doesn’t feel capricious because he has been listening the whole time.

From Salon Jul. 5, 2026

While engineers have spent decades trying to create “explainable AI,” a defining characteristic of today’s large language models is that they remain biased black boxes that are capricious in their decision-making.

From The Wall Street Journal Jun. 21, 2026

He called his arrest an "arbitrary, capricious prosecution".

From BBC Jun. 21, 2026

The venture's legal brief described the suspension order as "arbitrary and capricious."

From Barron's Jan. 15, 2026

Sometimes, however, possibly when my Muse was being capricious, I set aside my paints and drew cartoons.

From "Nine Stories" by J. D. Salinger

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