unpredictable

adjective

un·​pre·​dict·​able ˌən-pri-ˈdik-tə-bəl How to pronounce unpredictable (audio)
Synonyms of unpredictablenext
: not predictable: such as
a
: not able to be known or declared in advance
unpredictable weather
b
: tending to behave in ways that cannot be predicted
an unpredictable boss
unpredictably adverb
changes that occur unpredictably
unpredictability noun
the unpredictability of the weather

Examples of unpredictable in a Sentence

unpredictable spring weather that makes it really hard to know what to wear
Recent Examples on the Web
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.
The sequence is not only eyebrow-raising by the family-friendly Avatar franchise standards, but also arguably the film’s most interesting and unpredictable exchange — and might even be director James Cameron‘s favorite. James Hibberd, HollywoodReporter, 20 Dec. 2025 While the swing factors are inherently unpredictable, there seem a few broad questions hovering over the market as 2025 slips into the past. Michael Santoli, CNBC, 20 Dec. 2025 The full-zip ensemble is especially great for layering when temperatures are unpredictable—no constantly slipping a sweatshirt on and off over your head. Olivia Young, Travel + Leisure, 20 Dec. 2025 What follows is an unpredictable, eye-opening and hilarious examination of non-monogamy, with some wild fight sequences and a raw, revealing performance from Dakota Johnson in a supporting role. Eric Andersson, PEOPLE, 20 Dec. 2025 See All Example Sentences for unpredictable

Word History

First Known Use

1840, in the meaning defined above

Time Traveler
The first known use of unpredictable was in 1840

Browse Nearby Words

Cite this Entry

“Unpredictable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unpredictable. Accessed 24 Dec. 2025.

Kids Definition

unpredictable

adjective
un·​pre·​dict·​able
ˌən-pri-ˈdik-tə-bəl
: not predictable
unpredictability
-ˌdik-tə-ˈbil-ət-ē
noun
unpredictably
-ˈdik-tə-blē
adverb

More from Merriam-Webster on unpredictable

Last Updated: - Updated example sentences
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