WHY ENGLISH IS HARD:

Quite a lot and quite a few mean the same thing.

Slow up and slow down mean the same thing.

Fat chance and slim chance mean the same thing.

You fill in an application by filling it out.

A house can burn up as it burns down.

A wise man and a wise guy are opposites.

Overlook and oversee are opposites.

Lights go on but an alarm clock goes off.

What's up is what's going down.