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.
Unclear responsibilities and one-time, unpredictable funding hinder long-term solutions. Susan Ellenberg, Mercury News, 15 Apr. 2026 This unpaid domestic role was particularly grueling, given the wildly unpredictable nature of our lives. Literary Hub, 15 Apr. 2026 The iron frame is rust-resistant, while the performance fabric is designed to withstand the unpredictable summer storms. Blake Bakkila, Architectural Digest, 15 Apr. 2026 For some cross-border students living in Tijuana, the daily commute to school means sacrificing hours of sleep to wait in line at the often unpredictable border crossing to make it to class in San Diego on time. Alexandra Mendoza, San Diego Union-Tribune, 15 Apr. 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 19 Apr. 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

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