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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

"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

She admitted the cast were initially unsure about the new writer.

From BBC • Apr. 3, 2026

The company lost focus, unsure if it was selling to sneakerheads or soccer moms.

From The Wall Street Journal • Mar. 31, 2026

I nodded, unsure of whether my voice had left me.

From "The Detective's Assistant" by Kate Hannigan