The uncertainty of the future is causing anxiety.

The instructions were unclear.

His anger was uncontrollable.

She used a brush to uncover the dust on the bookshelf.

He was denied entry to the club because he was underage.

Many patients undergo medical tests to diagnose their condition.

I used an underline to emphasize an important word in my essay.

The cat is sleeping underneath the table.

I need to buy new underpants.

I need to undo the knot in this rope.