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 The Sagittarius Moon opposes Uranus, making social energy unpredictable and possibly opening the door to something more interesting than the original plan. — Tarot.com, Sun Sentinel, 14 Oct. 2026 But don’t forget that this is a Big Four category prone to the utterly unpredictable (see Bonnie Raitt’s 2022 win). — Jonathan Bernstein, Rolling Stone, 14 Oct. 2026 Together, these moves have created an unpredictable funding atmosphere for research, which often takes years and needs stability. — Tarini Mehta, Sacbee.com, 14 Oct. 2026 Because their co-op is entangled in an unpredictable land-lease situation, the units sell for about half the cost of what’s typical for Brooklyn Heights. — Anne Kadet, Curbed, 14 Oct. 2026 See All Example Sentences for unpredictable

Recent Examples of Synonyms for unpredictable

Adjective

Together, the tools could help accelerate the development of more resilient electric motor systems while reducing the risks associated with critical material shortages, volatile supply chains and rapidly changing global markets.

— Prabhat Ranjan Mishra, Interesting Engineering, 15 Oct. 2026
Daily crude flows are very volatile, with only 3 million barrels of crude transiting Hormuz on Monday while 6 million barrels passed through the strait on Friday, according to Kpler.

— Spencer Kimball, CNBC, 14 Oct. 2026

Definition of volatile

Adjective

Since Oppenheim and Fielder can’t record her there, their contact is mediated through her seemingly unstable and controlling husband, Billy Evans.

— Jackson McHenry, Vulture, 17 Oct. 2026
Lycopene can help protect blood vessels from the damaging effects of unstable molecules known as free radicals.

— MD Published, Verywell Health, 17 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