unsure

adjective

un·​sure ˌən-ˈshu̇r 

-ˈshər

especially Southern -ˈshȯr

: not marked by or given to feelings of confident certainty : not sure

was unsure of what to do

see also unsure of oneself

Synonyms of unsure

• skeptical
• suspicious
• uncertain
• doubtful

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

Jaramillo is unsure about what to do. —Steve Maugeri, CBS News, 12 Dec. 2025

Area meteorologists are unsure if this year’s thick radiation fog — known regionally as tule fog — will disperse in time for the holidays, thanks to persistent weather patterns keeping the cloud layer firmly over the region. —Camila Pedrosa, Sacbee.com, 10 Dec. 2025

If the Yankees are unsure about committing to Chisholm long-term, trading the star second baseman could yield a big return while helping fix their lineup imbalance. —Shaun McAvoy, MSNBC Newsweek, 10 Dec. 2025

Many were also unsure how the portable machine made it through airport security. —Kelly McGreal, FOXNews.com, 9 Dec. 2025

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for unsure

• abjure
• adjure
• allure
• assure
• brochure
• cocksure
• coiffure
• contour
• couture
• demure
• detour
• endure