When you cannot think of anything to do or say, boredom may come into the picture.

When you totally agree with something, you know its certain.

When a certain law comes out from the government it may read "Parking is prohibited in this area".

When you stare at something with your mouth wide open you tend to gawk at something.

When you are allowed to jump ahead in credits for post-secondary education it is called fast-track.

A metal structure with bars to prevent you from falling in is called a grate.

Taking care of snow on your driveway is an art.

To demonstrate something is to display it. 

When someone appears to  display something very unusual it is called abnormal.

A slow-moving part of a river is the backwater.