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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.

In 1855, Natalie is unsure who’s watching — a cruel producer?

From Los Angeles Times • Apr. 7, 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

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

From The Wall Street Journal • Mar. 31, 2026

There is no indication of its impending arrival, only a slight electricity in the air, though Herr Thiessen is unsure if anyone, save himself, can sense it.

From "The Night Circus" by Erin Morgenstern