UNPREDICTABLE Synonyms: 75 Similar and Opposite Words

unpredictable

adjective

ˌən-pri-ˈdik-tə-bəl

Definition of unpredictable

as in volatile

likely to change frequently, suddenly, or unexpectedly unpredictable spring weather that makes it really hard to know what to wear

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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 unpredictable This creates a gap, pushing startups to bypass scale-up funding directly to exits, a risky strategy given unpredictable IPO windows. — Rob Day, Forbes.com, 7 Aug. 2026 In contrast, ChatTJB’s responses are unwieldy and unpredictable. — Maggie Harrison Dupré, Futurism, 6 Aug. 2026 Inflation, changing consumer behavior, geopolitical instability, supply chain disruption, and rapidly evolving technology have created a particularly unpredictable business environment. — Wyles Daniel, USA Today, 6 Aug. 2026 In today's unpredictable economic climate, savers may be concerned about the safety associated with a CD account. — Matt Richardson, CBS News, 5 Aug. 2026 See All Example Sentences for unpredictable

Recent Examples of Synonyms for unpredictable

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

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

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