unsure

adjective

un·​sure ˌən-ˈshu̇r How to pronounce unsure (audio)
-ˈshər
especially Southern -ˈshȯr
Synonyms of unsurenext
: not marked by or given to feelings of confident certainty : not sure
was unsure of what to do

see also unsure of oneself

Examples of unsure in a Sentence

unsure of her ability to handle the pressure of competing in the Olympic Games
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.
Doing so, scientists say, directly feeds public fear at a time when many parents are already unsure whom to trust. Dr. Céline Gounder, CBS News, 19 Dec. 2025 Experts are unsure exactly why this happens, but very high levels of vitamin E may actually harm your heart rather than protect it. Brandi Jones, Verywell Health, 18 Dec. 2025 Lossless audio is becoming more common, but many people are still unsure what the term means. Kurt Knutsson, FOXNews.com, 18 Dec. 2025 Meanwhile, the market is increasingly unsure of who will succeed Powell. Alex Harring, CNBC, 16 Dec. 2025 See All Example Sentences for unsure

Word History

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of unsure was in the 15th century

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Cite this Entry

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

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