Synonyms of inconstancy

inconstancy

noun

(ˌ)in-ˈkän(t)-stən(t)-sē 

1

as in infidelity

lack of faithfulness especially to one's husband or wife

a wife who was long inured to the chronic inconstancy of her husband

Synonyms & Similar Words

• infidelity
• adultery
• betrayal
• disloyalty
• faithlessness
• perfidy
• unfaithfulness
• perfidiousness
• falseness
• treachery
• falsity
• duplicity
• treason
• deception
• lying
• deceit
• double-dealing
• double cross
• sellout

Antonyms & Near Antonyms

• loyalty
• constancy
• fidelity
• faith
• allegiance
• devotion
• faithfulness
• fealty
• steadfastness
• reliability
• devotedness
• dependability
• staunchness
• honesty
• trustworthiness

2

as in fluctuation

the frequent and usually sudden passing from one condition to another

the inconstancy of public opinion is such that today's hero may be tomorrow's punching bag

Synonyms & Similar Words

• fluctuation
• oscillation
• change
• flux
• transformation
• vacillation
• metamorphosis
• transmutation
• wavering
• mutation
• transmogrification

Example Sentences

Recent Examples of inconstancy

Scientific and engineering advances don't do well in the face of such wild swings and inconstancy. — Eric Berger, ArsTechnica, 18 Aug. 2025

Europeans, awakened to the danger of American inconstancy, are scrambling to spend trillions more on defense in coming years. — Adam Rasmi, Time, 20 June 2025

Years of naval inconstancy with repair work drove Vigor Industrial—a once vibrant and growing maritime conglomerate—into the welcoming arms of hedge funds, which wasted no time in striping the company of value. — Craig Hooper, Forbes, 20 Feb. 2024

Here, Calabazas appears to be holding a toy windmill in one hand and, in the other, a miniature portrait of a woman, perhaps intended by Velázquez as a commentary on the inconstancy of love. — Washington Post, 22 Feb. 2023

Due to his inconstancy and Angie’s growing attachment, their flimsy relationship operated on a timescale of eras coalescing into matters of historical record. — Hannah Gold, Harper’s Magazine , 26 Oct. 2022

Over the past 20 years, the United States has undermined its own global leadership by inconstancy. — Damon Linker, The Week, 9 June 2021