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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
Phrases
unsure of oneself
: lacking confidence in one's abilities
… he's a little unsure of himself when it comes to the music world …Seth Mnookin

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.
Due in part to Hayli Gubbi’s remote setting, geologists are unsure when Hayli Gubbi last erupted. MSNBC Newsweek, 5 Dec. 2025 Another 17% foresee no change, and 23% are unsure—and this holds across education levels and gender. Sheryl Estrada, Fortune, 5 Dec. 2025 Even the research team was unsure whether the idea could work. Aamir Khollam, Interesting Engineering, 5 Dec. 2025 If anyone is unsure if a property is already listed as a nuisance or for general information, call the city help line (414) 286-CITY (2489). Everett Eaton, jsonline.com, 5 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 7 Dec. 2025.

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