Words about words

Something is encrusted if it is covered in a layer of something else. Usually when you talk about something being encrusted, the layer is made up of lots of small things. Some expensive jewelry is encrusted with diamonds, and the rock in the picture is encrusted with barnacles.

Enormous is another word for huge. The boy in the picture thinks the horse is enormous.

Something erupts when it throws something out with great force, for example when lava erupts from a volcano.

A tree or shrub is called evergreen if it does not lose its leaves in autumn. Evergreen trees have green leaves all year around, and deciduous trees do not.

You are excited when you are really really happy about something. People get excited when they win the lottery, or are about to go away on holidays. Children often get excited at parties. People who are excited sometimes jump up and down and wave their arms around.

You exhale when you breathe out.
The opposite of exhale is inhale.

Something is expensive if it costs a lot of money. Expensive things are usually very high quality, or have a brand name or are made by someone that people are willing to pay extra for. The opposite of expensive is cheap.

You explain something when you make something easy to understand, or say how to do it in easy steps.
An explanation for something is a reason for it.

A plant or animal is extinct if there are no more of them alive anywhere in the world. You can only see extinct animals in books, or stuffed in a museum like the dodo in the picture.
Today, animals usually become extinct because people cut down all the trees and plants in the area where they live and they have nothing left to eat, or because people introduce a strange new animal that either eats them all so there are none left, or eats all their food and there is nothing left for them to eat.

Eyes is the plural of eye.