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

Ashley Brouillette is unsure if there was a background check. — Alina Hartounian, NPR, 17 July 2026

Researchers are unsure why boys appear to be most at risk of being infected. — Janet Loehrke, USA Today, 17 July 2026

Although some attendees were unsure what all the lead-free fuss was about, given that European suppliers had been using safer stabilizers since 1998, Baum reported the news as a minor triumph. — Kyle Devine, Longreads, 14 July 2026

Giblin is unsure what will happen to the pavilion when the church takes over. — Charlotte Observer, 13 July 2026

Word History

First Known Use

15th century, in the meaning defined above

Phrases Containing unsure

• unsure of oneself

Rhymes for unsure

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