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

Global oil prices have been volatile in recent weeks amid heightened uncertainty about potential outcomes from the Iran war.

— Sophie Tanno, CNN Money, 8 Aug. 2026
Those nitrogen oxides combine with volatile organic compounds on hot summer days, and the pollution contributes to climate change and harms human health.

— Noelle Phillips, Denver Post, 7 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

During the flight, crews are in constant communication with meteorological teams across the globe to track unpredictable weather patterns.

— Diego Mendoza, CNN Money, 7 Aug. 2026
Within these spaces, designed to produce idealized performances of femininity, the unpredictable rhythms of postpartum life become a quiet act of disruption.

— Alessia Glaviano, Vogue, 7 Aug. 2026

Definition of unpredictable

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

Along with the WiFi jammer, deputies said they were found to be in possession of false license plates and burglary tools.

— Dean Fioresi, CBS News, 13 Aug. 2026
Many of these times, KFA employees allegedly filed false expense reports chalking up the charges to meals, drinks, or standard massages.

— Jessie Yeung, CNN Money, 12 Aug. 2026

Definition of false

Adjective

No one sees exactly what happened, and the only witness, a mentally unstable man, gives conflicting accounts that deepen the uncertainty.

— Georg Szalai, HollywoodReporter, 10 Aug. 2026
Events plod forward, one after the other, and although Michael Shaeffer is a thoroughly compelling presence as the cruel and chronically unstable monarch Aerys, other performances seem nuance-free.

— Andreas Wiseman, Deadline, 10 Aug. 2026

Definition of unstable

Adjective

While the unanimous support from FDA advisors boded well for Moderna’s shot, the overall path to approval was treacherous and uncertain, even until the end.

— Beth Mole, ArsTechnica, 6 Aug. 2026
Fleeing an economic crisis and political repression back home, many Venezuelans have risked their lives on treacherous journeys to reach the US.

— Rocio Munoz, CNN Money, 4 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 13 Aug. 2026.

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Synonyms of inconstant

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