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

Engineers are unsure of the condition of Swift’s thermal insulation, and ground controllers will take a cautious approach to determining where and when Link’s robotic arms can capture the satellite. — Stephen Clark, ArsTechnica, 6 July 2026

Of course, many people are unsure of where AI is headed and how to make the best use of it. — William Arruda, Forbes.com, 5 July 2026

Nora Alexander, who owns the boutique Noon in Watch Hill, is unsure whether Swift will make an appearance in Rhode Island after her wedding. — Bella Decrescenzo, USA Today, 4 July 2026

The debate playing out in Kausen’s kitchen is repeated in homes across California and the country, where varying phrases on food packaging have long left shoppers unsure whether food is simply past its peak quality or unsafe to eat. — Olga R. Rodriguez, Fortune, 2 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