capricious

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

ADJECTIVE

given to sudden behavior change

Synonyms

STRONGEST

arbitrary careless erratic fickle flighty helter-skelter impulsive quirky temperamental unpredictable unreasonable unstable volatile wayward whimsical

WEAK

any way the wind blows blowing hot and cold changeful contrary crotchety effervescent every which way fanciful fitful flaky freakish gaga humorsome inconstant kinky lubricious mercurial moody mutable notional odd picky punchy ticklish up and down vagarious variable yo-yo

Antonyms

STRONGEST

cautious constant predictable reasonable reliable sensible stable steady thoughtful unchanging

WEAK

dependable staid steadfast

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

In her ruling, she said the government's designation of Anthropic as a supply chain risk was "likely both contrary to law and arbitrary and capricious."

From Barron's • Mar. 26, 2026

There’s also a First Amendment claim, and an Administrative Procedure Act claim, which is that the government is acting illegally in an arbitrary and capricious way.

From Salon • Jan. 28, 2026

On Monday, Massachusetts district court judge Patti B Saris vacated Trump's order, saying it was "arbitrary and capricious and contrary to law".

From BBC • Dec. 9, 2025

She felt excited and strange, and not knowing what else to do, followed a capricious impulse, and, withdrawing her hands, said petulantly, “I don’t choose. Please go away and let me be!”

From "Little Women" by Louisa May Alcott

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