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

Synonyms & Similar Words

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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

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 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 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 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

One wild card for inflation has been oil prices, which have been volatile due to uncertainty about the war in Iran.

— ABC News, ABC News, 28 Aug. 2026
Citadel’s stock transactions are giving investors a glimpse of how Griffin is navigating an increasingly volatile market.

— Miami Herald, Miami Herald, 28 Aug. 2026

Definition of volatile

Adjective

Telemachus’ lone contribution is killing Melanthius, the traitorous Ithacan farmhand, thus preventing him from continuing to arm the suitors.

— Marlow Stern, Variety, 17 July 2026
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

Definition of traitorous

Adjective

Researchers from Tohoku University in Japan and VISTEC in Thailand say the approach could help robots move more effectively through unpredictable terrain.

— Jijo Malayil, Interesting Engineering, 28 Aug. 2026
Prolific and versatile, Richard Linklater has been one of the most joyously unpredictable filmmakers for more than 35 years.

— Mark Olsen, Los Angeles Times, 27 Aug. 2026

Definition of unpredictable

Adjective

The 5,000 sailors and Marines on board have been working sustained combat operations, dealing with extension after extension and unreliable access to food, basic hygiene supplies, and mail.

— Andrea N. Goldstein, The Atlantic, 28 Aug. 2026
Print editions overseas also reach service members in remote locations where internet access is spotty and unreliable.

— Jacob Rosen, CBS News, 27 Aug. 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

Another false dawn was Manchester City’s bright start in a 2-0 win over Chelsea, without the man who had just been named player of the tournament at Euro 2024, Rodri.

— Michael Cox, New York Times, 26 Aug. 2026
In turn, Baldoni and Wayfarer Studios filed a defamation suit, which claimed Lively and her husband, Ryan Reynolds, had planted false claims in order to take over creative control of the film.

— Caitlin Huston, HollywoodReporter, 26 Aug. 2026

Definition of false

Adjective

Risk assessments should examine where a river bends, where slopes are unstable and where a single failure could cut off several communities.

— Victoria Milko, Fortune, 31 Aug. 2026
Significant political risk remains due to Venezuela's unstable government and historical tendency to renege on oil agreements.

— Michael Lynch, Forbes.com, 30 Aug. 2026

Definition of unstable

Adjective

At face value, young men exercising should not be reason to sound the alarms, and yet there is something treacherous about men in their formative years placing physical beauty as the ultimate expression of self-actualization.

— José Criales-Unzueta, Vanity Fair, 27 Aug. 2026
Jacksonville, a city of about 1 million, is particularly treacherous for children living in areas north and west of downtown.

— Yona Gavino, Miami Herald, 25 Aug. 2026

Definition of treacherous

Browse Nearby Words

inconstancy

inconstant

incontestable

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“Inconstant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/inconstant. Accessed 1 Sep. 2026.

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Synonyms of inconstant

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