Synonym Chooser

How does the adjective mercurial differ from other similar words?

Some common synonyms of mercurial are capricious, fickle, inconstant, and unstable. While all these words mean "lacking firmness or steadiness (as in purpose or devotion)," mercurial implies a rapid changeability in mood.

made anxious by her boss's mercurial temperament

When could capricious be used to replace mercurial?

The words capricious and mercurial can be used in similar contexts, but capricious suggests motivation by sudden whim or fancy and stresses unpredictability.

an utterly capricious critic

When is fickle a more appropriate choice than mercurial?

While in some cases nearly identical to mercurial, fickle suggests unreliability because of perverse changeability and incapacity for steadfastness.

performers discover how fickle fans can be

When is it sensible to use inconstant instead of mercurial?

The synonyms inconstant and mercurial are sometimes interchangeable, but inconstant implies an incapacity for steadiness and an inherent tendency to change.

an inconstant friend

When would unstable be a good substitute for mercurial?

Although the words unstable and mercurial have much in common, unstable implies an incapacity for remaining in a fixed position or steady course and applies especially to a lack of emotional balance.

too unstable to hold a job

Examples Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of mercurial Read more Dua and Callum’s Couple Style Is, Like Them, Hot Turner’s low-key but considered looks are the perfect backdrop to his girlfriend’s more mercurial wardrobe. Elizabeth Logan, Glamour, 27 Dec. 2024 The sequel is part prison drama, part musical, as incarcerated clown Arthur Fleck (Phoenix) goes on trial for multiple murders but finds a mercurial soulmate in an understanding super-fan (Lady Gaga). Brian Truitt, USA TODAY, 24 Dec. 2024 Dickinson’s mercurial and mysterious Samuel is the key to everything for her, and the audience. Katie Walsh, Twin Cities, 24 Dec. 2024 The future of these tools—some of the most consequential the United States possesses—now resides with a mercurial president. Henry Farrell, Foreign Affairs, 23 Dec. 2024 See all Example Sentences for mercurial 

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Cite this Entry

“Mercurial.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/mercurial. Accessed 21 Jan. 2025.

More from Merriam-Webster on mercurial

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