Thesaurus.com
Dictionary.com
Showing results for unsure. Search instead for unsurpr.
Definitions

unsure

[uhn-shoor, ‐shur] / ʌnˈʃʊər, ‐ʃɜr /
ADJECTIVE
doubtful, insecure
Synonyms
STRONGEST
distrustful dubious hesitant indecisive mistrustful shaky skeptical suspicious uncertain unclear unconvinced undecided
WEAK
betwixt and between borderline fluctuant fly-by-night iffy in a quandary indeterminate irresolute lacking open problematic rootless touch and go unassured unconfident undependable unreliable unstable untrustworthy untrusty up for grabs vacillating wavering weak wimpy wobbly
Antonyms
STRONGEST
believing certain clear definite determined indubious sure trustworthy trusty undoubted unwavering
WEAK
secure

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Overall, voters of all ethnic backgrounds remained significantly undecided, with 40% unsure who they plan on backing when the polls open June 2.

From Los Angeles Times • Apr. 6, 2026

Last month she said it was "part of my purpose right now" to return to work although she was unsure if she would still be able to do it.

From BBC • Apr. 6, 2026

"It's truly very sad to know people had to abandon homes built over a lifetime, unsure if they will ever return."

From Barron's • Apr. 5, 2026

Scientists were unsure whether those dips were caused by dark spots on the star or by material orbiting nearby.

From Science Daily • Mar. 27, 2026

As for Major Puff, he was unsure whether he could proclaim victory or admit defeat or simply call it a tie.

From "The Very, Very Far North" by Dan Bar-el