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

Early estimates say the facility should open in April, but Oakwood officials are unsure, given the water and sewage infrastructure issues have yet to be resolved. —Irene Wright, USA Today, 10 Mar. 2026

Spotted skunks are a species of concern because scientists are unsure why its population has been declining in recent years, says Mengak. —Arricca Elin Sansone, Southern Living, 10 Mar. 2026

These delicate items can’t be tossed in the washing machine, which leaves many people unsure how to clean them. —Kansas City Star, 5 Mar. 2026

The tragedy at first bewildered law enforcement in both states, as investigators were unsure why Miller traveled to Utah or why the three women were killed. —Holly Yan, CNN Money, 5 Mar. 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