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

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

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

How To Ask About a Childfree Wedding If a guest is unsure, Hayes said communication is key. —Alice Gibbs, MSNBC Newsweek, 27 Nov. 2025

Many Americans seem genuinely unsure what distinguishes the different class gradations, or where their own household falls. —Nick Lichtenberg, Fortune, 26 Nov. 2025

The woman turned to Reddit, feeling overwhelmed and unsure, but the commenters were blunt with her in their replies. —Ashley Vega, PEOPLE, 26 Nov. 2025

Just over half have either received the flu vaccine for their children or plan to, while the other half either do not intend to vaccinate their children or are still unsure. —Sarah Scott, Parents, 25 Nov. 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