You crush something when you put so much pressure on it that it changes shape or breaks.
Some things that are often crushed are garlic cloves, old cars and soda cans, like in the picture.
Cis forCrustacean
Crutches are pieces of wood with padded handles that you use to help you walk. You tuck the ends of the crutches under your arms.
People usually use crutches when they have a broken leg or sprained ankle. If you can't walk at all, you will need a wheelchair.
Cis forCrystal Ball
A crystal ball is thought to aid people in telling the future. Gazing in to a crystal ball is supposed to reveal images that may be used to help tell someone's fortune.