If you return somewhere, it means that you go back to somewhere that you were before.
If you show someone something, it means that you make it possible for them to see it.
If you have a lot of something, it means that you have a large number, or a large amount, of it.
A sink is something that you have in your bathroom or kitchen.
Smoke is the white, black or gray air above a fire.
If you spell something, it means that you write a word with the correct letters.
A stick is a long, thin piece of wood.
If something is straight, it means that it goes in one direction.
If you take something, it means that you have it now because of something that you did.
If something is thick, it means that it is wide or fat.