unpredictable

adjective

un·​pre·​dict·​able ˌən-pri-ˈdik-tə-bəl How to pronounce unpredictable (audio)
: 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.
Need for clarity The fog around the case only serves to feed tensions in Europe at a time when unity against Russia, and an unpredictable ally in the US, is all-important. Joseph Ataman, CNN Money, 15 Nov. 2025 Friday’s events unfolded in front of witnesses and included rescue attempts by an off-duty State Parks lifeguard, illustrating the unpredictable danger posed by strong rip currents and large waves even in daylight hours. Hollie Silverman, MSNBC Newsweek, 15 Nov. 2025 That interpretation has stood ever since, making birthright citizenship one of the most durable concepts in America’s unpredictable political life. Rachel Morris, New Yorker, 14 Nov. 2025 Lakefront Brewery is entering the THC game amid an unpredictable time for the hemp industry. Hannah Kirby, jsonline.com, 14 Nov. 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 16 Nov. 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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