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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

"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

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

Gingersnipes had been in this very position since she’d arrived in Deadwood: confused and unsure of her own eternal fate.

From "The Undead Fox of Deadwood Forest" by Aubrey Hartman