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.
If the mother has questions or feels unsure, the clinic might ask her to come back or wait for a phone call. Washington Post, 9 Jan. 2026 That growth is in part due to UC offering admission to more internationals because campuses were unsure of how many would enroll amid restrictions. Jaweed Kaleem, Los Angeles Times, 8 Jan. 2026 Acosta ultimately decided to fold his donation into his current endowment funding that supports travel for any college of pharmacy PhD student, having already donated half of his pledge and unsure if and when his diversity focused scholarship would be considered. Lily Kepner, Austin American Statesman, 8 Jan. 2026 Physicist Francis Perrin sat with the discovery, unsure what to make of it. New Atlas, 8 Jan. 2026 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 13 Jan. 2026.

More from Merriam-Webster on unsure

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