Words starting with U

Words that start with U

List of things that start with the letter U.

Upside-down unicorns under an ultramarine umbrella.

Photo of a hand unlocking a door
Photo by Alan Cleaver
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You unlock something when you open a lock, usually by using a key.

Photo of books
Photo by Ruth Ellison
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A book or any other piece of writing is unread if you have not read it. Once you have read a book, and then give it to someone else who hasn't read it, it becomes unread again to the new person.

Photo of a man doing something unsafe
Photo by Jens Rost
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Unsafe is the opposite of safe. Something unsafe has a high risk of danger. The man in the picture has chosen an unsafe way to reach the roof he is working on.

Photo of a man with his shirt untucked
Photo by sheila miguez
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Untucked is the opposite of tucked, where the loose edge of something is flapping about not held in place. The man in the picture has his shirt untucked.

Something is unusual if it is not what you expect for something of that kind. Something unusual is not ordinary.
The person in the picture is wearing an unusual hat.

Photo of someone up a ladder
Photo by Sara. Nel
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Up is a direction. You go up when you go higher. The person in the picture has just climbed up the ladder and is now sitting at the top. The opposite of up is down.

A tree is uprooted when it falls down with its roots attached, like in the picture. Trees are usually uprooted by storms.

Photo of an upset toddler
Photo by Bridget Coila
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You upset something when you disturb it. You can upset your stomach by eating bad food, or you can upset a pile of something by knocking it over.
But when most people say upset they mean to disturb someone's emotions, which often makes them sad and agitated. The child in the picture is upset.

Photo of a girl hanging upside down on a swing
Photo by Johnny Jet
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You are upside-down when your head is lower than your feet. You can go upside-down hanging from play equipment like monkey bars, or if an adult holds you up by your feet. The world looks different when you are upside-down.
When you turn anything else the wrong way up you say it is upside-down. Cats often lie upside-down with their legs in the air.

Photo of an upturned chair
Photo by David Wan
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You upturn something when you flip it upside down. Once you upturn something, it is upturned.