Adjectives that start with U

Something is unique if there is nothing else like it. When something is unique, there is only one thing of its kind.

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.

Something is unsafe if it has a high risk of danger. The man in the picture has chosen an unsafe way to reach the roof he is working on. Unsafe is the opposite of safe.

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.

You upturn something when you flip it upside down. Once you upturn something, it is upturned.