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:

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.
Officers are unsure what caused the semi to overturn, but said that the thick liquid began to flow out of the trailer and quickly spread, creating an inch-thick layer of syrup across the westbound lanes. Dean Fioresi, CBS News, 17 Mar. 2026 Zendaya first sparked wedding rumors last month when she was spotted with a gold band in place of her usual rock, though fans were unsure if the actor had simply turned her ring towards her palm or switched to a simpler ring to keep the real one safe. Emily Tannenbaum, Glamour, 16 Mar. 2026 Early polling suggests the war is unpopular with most Americans, as just 29% approve of the strikes, while 43% disapprove and 26% remain unsure, according to an Ipsos poll. Will Steakin, ABC News, 16 Mar. 2026 While there have been repatriation flights organized for South Africans, the couple did not pursue that avenue, being unsure of whether the government could — or would — assist in evacuating two citizens who live outside outside the country. Blane Bachelor, CNN Money, 14 Mar. 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 22 Mar. 2026.

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