unsure
Americanadjective
-
not certain or confident.
He arrived at the party unsure of his welcome.
-
unknown or liable to change; not determined or definite.
The monthly trend for this stock is still unsure, but the daily trend is upward.
What happened next is unsure.
adjective
-
lacking assurance or self-confidence
-
(usually postpositive) without sure knowledge; uncertain
unsure of her agreement
-
precarious; insecure
-
not certain or reliable
Etymology
Origin of unsure
First recorded in 1400–50; Middle English unseur(e) “unsafe; precarious; uncertain”; un- 1 ( def. ) + sure ( def. )
Explanation
If you're unsure, you don't feel confident. It's natural to feel unsure of yourself the very first time you read your poems in front of an audience. When you feel unsure, you find yourself full of doubt. If you remember how unsure you felt on your first day of school, you may want to befriend that new kid who looks unsure about where to sit in class. You can be unsure of yourself, or unsure how to comfort your friend whose cat just died. When this word was originally used in the 15th century, it primarily meant "not safe from attack."
Vocabulary lists containing unsure
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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.
Pelosi allegedly acknowledged “hitting something,” but said he was unsure about what he hit, so he continued driving, officials said.
From Los Angeles Times ● Jul. 4, 2026
More than half – 53% – said it would harm the economy, 19% said it would help, 18% said there would be no impact, and 10% were unsure.
From Salon ● Jun. 28, 2026
"A country like India, for instance, is very unsure whether it can follow in the footsteps of China," he said.
From Barron's ● Jun. 26, 2026
Warsh faces a high-wire act at his first press conference, with investors still unsure what he believes.
From The Wall Street Journal ● Jun. 17, 2026
She seems unsure as to where to put her hands.
From "Kwame Crashes the Underworld" by Craig Kofi Farmer
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
