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 And how does a band that helped frame rock’s future now shape its own, especially since all of this late success remains so unexpected and unpredictable? — Grayson Haver Currin, Pitchfork, 10 Nov. 2026 In the wildly unpredictable NFL, the Chargers have emerged as a rare sure bet. — Los Angeles Times, 9 Nov. 2026 That delay, paired with unpredictable triggers including heat or cleaning products, often makes the condition extremely difficult to manage. — Nicole Clark, Time, 8 Nov. 2026 The 100 percent polyester fabric is light, yet durable enough to protect you from unpredictable autumn weather. — Kate Donovan, Southern Living, 7 Nov. 2026 See All Example Sentences for unpredictable

Recent Examples of Synonyms for unpredictable

Adjective

Technology stocks — a key driver of rallies in recent years — have been notably volatile in 2026.

— Chloe Taylor, CNBC, 11 Nov. 2026
In the case of foods and certain beverages, breakdown of the amino acids results in volatile Strecker aldehydes, which are responsible for aroma, and in aminoketones, which impart flavor and coloration, particularly browning.

— Encyclopedia Britannica, Encyclopedia Britannica, 9 Nov. 2026

Definition of volatile

Adjective

The glow of many Turners has dwindled, thanks to unstable pigments, but here is an immaculate exception.

— Anthony Lane, New Yorker, 5 Nov. 2026
And while unstable coalitions repeatedly fused and dissolved in the halls of power, outside these halls pipes burst and roads crumbled.

— Ryan Lenora Brown, Christian Science Monitor, 5 Nov. 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