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

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

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 Affordable electric bikes usually mean enduring heavy frames, clunky kick-in for the motor and unrefined, unpredictable power delivery. — New Atlas, 19 Oct. 2026 Josh Lucas gives a gripping performance as Hurdis, taking viewers on a thrilling and unpredictable ride where danger—and murder—waits around every turn. — Andreas Wiseman, Deadline, 19 Oct. 2026 No state, after all, wants its defensive systems to be at the mercy of unpredictable actors. — Gerard Toal, The Conversation, 16 Oct. 2026 Even if the weather’s unpredictable, her ensemble is consistently polished and princess-worthy. — Bailey Bujnosek, InStyle, 16 Oct. 2026 See All Example Sentences for unpredictable

Recent Examples of Synonyms for unpredictable

Adjective

Instead, the name of the game is to create pockets of stability in an inherently volatile business.

— Tim McDonnell, semafor.com, 22 Oct. 2026
Targeting a smaller raise could protect a higher valuation, but might trigger skepticism over how the AI firm will fund its massive infrastructure needs in a volatile bond market.

— Justin Zacks, CNBC, 21 Oct. 2026

Definition of volatile

Adjective

Water essentially acts as a catalyst that spontaneously creates particles known as hydroxyl radicals, unstable molecules linked to aging and disease.

— Michael Hawthorne, Chicago Tribune, 22 Oct. 2026
If a tree appears diseased, unstable or at risk of falling, consider documenting the problem and notifying the owner in writing.

— Sacbee.com, Sacbee.com, 22 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