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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

Derived 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.

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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.

That’s a quintessential example of an agency action that’s unlawfully arbitrary and capricious.

From Slate • Mar. 27, 2026

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

From Barron's • Jan. 15, 2026

Such arrests appear arbitrary and capricious, and are unlikely to survive scrutiny by the courts, Judge Pitts ruled Wednesday.

From Los Angeles Times • Dec. 25, 2025

These actions, according to the lawsuit, were “ arbitrary, capricious, an abuse of discretion, not in accordance with law, and therefore invalid under the Administrative Procedure Act.”

From Salon • Dec. 11, 2025

What I knew of physics I had learned in the junkyard, where the physical world often seemed unstable, capricious.

From "Educated" by Tara Westover

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