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 forest had taught him that city dwellers could often be regulated by cruel and rather unpredictable codes. Literary Hub, 12 Jan. 2026 Moerdeng Long Hooded Puffer Coat This puffer coat stands out for its plush fleece lining, along with a waterproof polyester shell and insulating cotton down fill that help block wind and moisture in unpredictable winter weather. Lauren Dana Ellman, Travel + Leisure, 11 Jan. 2026 Seats on the fast ferry are limited, and walk-in ticket purchases have historically been unpredictable. Maria Williams, USA Today, 11 Jan. 2026 Austin immigration advocates have argued that similar changes in Austin, and a lack of clarification from the police department on its policy, sends a message that contact with officers — even as a victim or witness — carries unpredictable risks for immigrant families. Emiliano Tahui Gómez, Austin American Statesman, 10 Jan. 2026 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 13 Jan. 2026.

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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