rugged

In America, we have this image of Australia as being very rugged.

A 'rugged' place is rocky and not well maintained. It is very natural and has not been altered by humans. Notice the following:

1. I prefer a more rugged landscape than the city.
   
2. There are miles of rugged trails in the mountains.
   

deadly

We have some deadly spiders and snakes.

If an animal is 'deadly' it can kill you. Notice the following:

1. The poison that it injects in its prey is deadly.
   
2. Have you ever seen a deadly animal?
   

crocodile water

Unless you go swimming in crocodile water, you never see them.

'Crocodile water' is water where crocodiles live. Notice the following:

1. This place definitely looks like crocodile water.
   
2. There is a lot of crocodile water around here.
   

look for

You'll never see them, unless you go looking for it.

When you 'look for' something you are searching or trying to find it. Notice the following:

1. We are looking for a good place to sit down in the sun.
   
2. I'm looking for my passport and I can't find it.
   

cross the road

It's more dangerous to cross the road than to go swimming.

When you go from one side of a road to the other side you are 'crossing the road.' Notice the following:

1. Be careful driving because a lot of animals cross the road in this area.
   
2. My parents taught me to hold their hands when I crossed the road.