Words about words

You sit down when you put most of your weight on your bottom, on a surface like a chair or sofa. Sitting down is usually more comfortable than standing up.

You skid when you slide along the ground, with no rotation. Cars can skid along the road when there is ice on the road or they go too fast and lose control.

Skint is a slang word for poor. If you only have a few coins, you can say you're skint.

Something is described a sleek if it is smooth and shiny. Sleek is a word most often used to describe the coat of an animal like a cat or horse but can also be used to describe a particularly beautiful car or even some electronic devices.

Slept is the past tense of sleep.

Slick means shiny, smooth, or slippery. Lots of men enjoy styling their hair so it looks slick.

You slide along a slippery surface by moving across it without ever breaking contact with that surface. The people in the picture are sliding down a waterslide.

Something is slippery if it very hard to get a hold of, or you can't stick to it. A slippery surface is one your shoes or feet don't grip onto, so you fall over when you are walking on them. Slippery things are usually very smooth and are often wet and slimey.
Some things that are slippery are ice, wet roads, banana peels, and rocks at the beach at low tide that have algae growing on them.
The opposite of slippery is sticky.

Snails move very slowly. If you take a very long time to finish doing something, you are slow. The opposite of slow is fast.

Something is small if other things are much bigger than it. In the picture, the dog on the bench is much smaller than the dog on the ground.