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

Patriot batteries are being deployed, but communities are still developing civil-defense plans, leaving some residents unsure where to take shelter. — Claudia Ciobanu, Los Angeles Times, 29 Sep. 2026

Incredibly, SpaceX seemed unsure as to whether to push ahead to orbit, calling off that part of the test for a brief moment before deciding to go for orbit minutes later. — Lee Billings, Scientific American, 28 Sep. 2026

At the time, many fans were unsure if Laboriel would become a permanent fixture to the band and return later this weekend. — Charisma Madarang, Rolling Stone, 28 Sep. 2026

If employees leave a conversation unsure about what exactly needs to be done, performance suffers. — Expert Panel®, Forbes.com, 28 Sep. 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