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.
Yet Maguire is also unsure of his future. Andy Mitten, New York Times, 28 Jan. 2026 On the streets, Iranians are unsure which side poses a greater threat. Joseph Ataman, CNN Money, 27 Jan. 2026 Federal agencies seem unsure what, if any, investigation is occurring, according to The Washington Post, although White House Press Secretary Karoline Leavitt said today that DHS and CBP are investigating the Pretti shooting, including reviewing body-cam footage. David A. Graham, The Atlantic, 26 Jan. 2026 All while being unsure of how to respond. Jace Frederick, Twin Cities, 26 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

Browse Nearby Words

Cite this Entry

“Unsure.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unsure. Accessed 2 Feb. 2026.

More from Merriam-Webster on unsure

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!