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

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Recent Examples of unpredictable Overall, political observers see the episode as an example of how the president’s political strategy can be unpredictable at a time when Republicans are trying to control the message the most. — Ana Ceballos, Los Angeles Times, 6 Oct. 2026 Season one coming out — even just knowing that there was going to be a show and then it getting announced — all of that was exciting and wild and unpredictable. — Nicole Fell, HollywoodReporter, 4 Oct. 2026 Advertisement Since polling hours and conditions vary by county, and even within a county, wait times can be unpredictable. — Time Staff, Time, 3 Oct. 2026 The versatile multi-genre jam band from Virginia continues to be unpredictable, funny and fresh in its live shows. — Christopher Arnott, Hartford Courant, 3 Oct. 2026 See All Example Sentences for unpredictable

Recent Examples of Synonyms for unpredictable

Adjective

The researchers focused on volatile elements such as sodium, zinc and potassium, which evaporate easily at high temperatures.

— Sharmila Kuthunur, Space.com, 6 Oct. 2026
Gonzales pointed to the volatile state budget’s dependence on tax revenue from wealthy Californians, some of whom have proactively moved out of the state because of the proposal.

— Seema Mehta, Los Angeles Times, 6 Oct. 2026

Definition of volatile

Adjective

Numerous tornado warnings were also issued for parts of South Carolina and Georgia as the remnants of Isaias move northward and help create supercells of rain and unstable air, according to National Weather Service alerts and forecasts.

— Erika Angulo, NBC news, 11 Oct. 2026
The changes produce new attractors that correspond to stable cell types in the low-lying valleys; unstable gene-activity configurations constitute the high ground.

— Quanta Magazine, Quanta Magazine, 9 Oct. 2026

Definition of unstable

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