INCONSTANT Synonyms: 124 Similar and Opposite Words

Q: 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

Q: 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

Q: 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

Q: 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

Q: 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

inconstant

adjective

(ˌ)in-ˈkän(t)-stənt

Definition of inconstant

as in volatile

likely to change frequently, suddenly, or unexpectedly our windjammer sailed wherever the inconstant winds took us

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Antonyms & Near Antonyms

as in traitorous

not true in one's allegiance to someone or something an inconstant but always entertaining friend

Synonyms & Similar Words

Antonyms & Near Antonyms

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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 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 The self is a shifting, inconstant phenomenon, brain and body ever transforming in time and space, with no clear delineation between what is self and what is other. — Lauren Groff, The Atlantic, 20 Aug. 2025 Each one grew up in a home that required her to curry favor with volatile and inconstant parents—a menacing father figure, a recessive and enabling mother—and each found a fragile safety in her caretakers’ occasional good will. — Katy Waldman, New Yorker, 12 Jan. 2026 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 See All Example Sentences for inconstant

Recent Examples of Synonyms for inconstant

Adjective

Related Stories Set in 1948 Malaya in the volatile years that followed the end of World War II, the film traces a Malay soldier and a British soldier who are left behind after the British military withdraws.

— Naman Ramachandran, Variety, 3 July 2026
While the rally continued into early 2026, trade soon turned volatile.

— Chloe Taylor, CNBC, 3 July 2026

Definition of volatile

Adjective

And at the very center of Hell is Satan himself, the traitorous Archangel Lucifer, depicted as a monstrous creature with wings and three heads.

— Keith Cooper, Space.com, 11 May 2026
Russell fabricates a lie with the rest of the villains, and the heroes believe it, despite a warning from one traitorous tribemate.

— Literary Hub, Literary Hub, 5 Dec. 2025

Definition of traitorous

Adjective

Employees quickly abandon systems that are slow, unreliable or difficult to use.

— Damini Sood, Forbes.com, 2 July 2026
But weak charging infrastructure, limited and unreliable electricity supply outside major cities, and high financing costs could constrain widespread adoption on the continent, even as investors race to build out infrastructure.

— Jenny Vaughan, semafor.com, 1 July 2026

Definition of unreliable

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

Definition of changeful

Adjective

Relying on hand tools instead of heavy machinery, firefighters tunneled through unstable debris to rescue a security guard trapped for eight days.

— Mery Mogollón, Los Angeles Times, 5 July 2026
In an unstable industry with IP, nepotism and maybe even now artificial intelligence ruling supreme, Ridd and Boa have doubled down on emerging filmmakers with original stories.

— Lily Ford, HollywoodReporter, 2 July 2026

Definition of unstable

Adjective

The infamous cyclops briefly appeared, as well as footage of Odysseus and his men battling the cannibalistic race of giants known as Laestrygonians and navigating around the treacherous whirlpool Charybdis.

— Jennifer Ouellette, ArsTechnica, 1 July 2026
According to the hiking blog, The Hiking HI, the rock bridge can only be traversed at low tide, but can be treacherous either way.

— Sam Gillette, PEOPLE, 30 June 2026

Definition of treacherous

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inconstancy

inconstant

incontestable

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“Inconstant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/inconstant. Accessed 8 Jul. 2026.

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Synonyms of inconstant

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