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Synonym Chooser

How does the adjective inconstant differ from other similar words?

Some common synonyms of inconstant are capricious, fickle, mercurial, and unstable. While all these words mean "lacking firmness or steadiness (as in purpose or devotion)," inconstant implies an incapacity for steadiness and an inherent tendency to change.

an inconstant friend

When could capricious be used to replace inconstant?

The meanings of capricious and inconstant largely overlap; however, capricious suggests motivation by sudden whim or fancy and stresses unpredictability.

an utterly capricious critic

Where would fickle be a reasonable alternative to inconstant?

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

performers discover how fickle fans can be

When can mercurial be used instead of inconstant?

While the synonyms mercurial and inconstant are close in meaning, mercurial implies a rapid changeability in mood.

made anxious by her boss's mercurial temperament

When would unstable be a good substitute for inconstant?

The words unstable and inconstant can be used in similar contexts, but 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

Example 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 inconstant If the United States is an unreliable partner and a source of chaos these countries will turn elsewhere, building new security and trade alliances that don’t depend on the inconstant, waning superpower. Lydia Polgreen, Mercury News, 27 May 2025 Much like a patient who fails to finish a course of antibiotics, inconstant policies may incur all the costs and none of the benefits. David Carlin, Forbes, 24 Mar. 2025 Energy experts have been warning that electricity is likely to get more expensive and less reliable unless renewable power that waxes and wanes under inconstant sunlight and wind is backed up by generators that can run whenever needed. IEEE Spectrum, 9 May 2024 The key finding is that as the distance grows greater, the coupling stops growing, and the inconstant constant becomes constant once more. Stanley J. Brodsky, Scientific American, 16 Apr. 2024 See All Example Sentences for inconstant
Recent Examples of Synonyms for inconstant
Adjective
  • This potential hindrance to growth adds another layer of uncertainty to an already volatile policy outlook.
    John Melloy, CNBC, 1 Oct. 2025
  • The remnants of a tropical storm that brought steamy rain and a volatile atmosphere to the Bay Area last week have faded, according to the National Weather Service.
    Rick Hurd, Mercury News, 30 Sep. 2025
Adjective
  • Clarisse looks intimidating climbing out of a boat, as does Bushnell’s traitorous Luke, who wields a sharp-looking knife.
    Dessi Gomez, Deadline, 24 July 2025
  • There's a delicious whodunit aspect to it, too, as the list of five potentially traitorous suspects includes the operative's own high-profile wife (Cate Blanchett).
    Brian Truitt, USA Today, 4 July 2025
Adjective
  • Prepare for mood swings as the moon clashes with unpredictable Uranus.
    USA TODAY, USA Today, 4 Oct. 2025
  • The Roval is among the most unpredictable races on the NASCAR calendar.
    Shane Connuck October 3, Charlotte Observer, 3 Oct. 2025
Adjective
  • This variability makes tungsten diselenide unreliable for quantum applications.
    Neetika Walter, Interesting Engineering, 3 Oct. 2025
  • Much of the country relies on petrol generators because the grid is patchy and unreliable, but unsubsidized fuel is too expensive for most.
    semafor.com, semafor.com, 30 Sep. 2025
Adjective
  • Rigorous, blustery winter; winding sleety spring; hot, moist enervating summer; changeful autumn with its dog-days; these are absolutely unknown.
    San Diego Union-Tribune, San Diego Union-Tribune, 1 Jan. 2023
  • Hers is the kind of face that inspires directors to tight framing — gleaming, as if smoothed from marble, and yet somehow pliant, changeful.
    Jordan Kisner Jack Davison, New York Times, 11 Oct. 2022
Adjective
  • Evaluating defamation claims where the report contains demonstrably false factual assertions.
    Tim Reynolds, Fortune, 3 Oct. 2025
  • However, as several independent experts interviewed by NPR note, that claim is false.
    Scott Neuman, NPR, 3 Oct. 2025
Adjective
  • Those settlers managed to make an underground river with murderous maggots on unstable terrain into a tourist attraction in record time.
    Ann Patchett, New Yorker, 29 Sep. 2025
  • Gun violence, social media, and an unstable economy all contribute to their mental health struggles.
    Ashleigh N. DeLuca, Parents, 26 Sep. 2025
Adjective
  • Under an imperial decree, her captors become unlikely allies, guiding Jewish refugees through ambushes, shifting alliances and treacherous waters, while Sara confronts leadership, loyalty and love at a high cost.
    Ben Croll, Variety, 29 Sep. 2025
  • In the cataclysmic civil war at Kuru-kshetra, both the divine Pandava brothers and their treacherous cousins, the Kauravas, end up breaking the rules of war to achieve victory at any cost.
    Seamus Sullivan September 29, Literary Hub, 29 Sep. 2025

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Cite this Entry

“Inconstant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/inconstant. Accessed 6 Oct. 2025.

Last Updated: - Updated example sentences
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