An object that's been pressed or crushed becomes crunched.
When you eat an apple and bite into it with your teeth, but then realize it was harder than expected and some of it gets mashed between your teeth, that feeling is like being crunched. If someone steps on a bug accidentally, the poor little thing might get crunched. Crunchy foods are often eaten because they provide a satisfying texture when you crunch them in your mouth - think carrots or chips. Sometimes people use crunched to describe something that's not working properly, like "the system got crunched" meaning it slowed down or stopped working for a bit.
To crush something, especially food, with a noisy crackling sound.
Example: When I came home, Susan was watching TV with her feet up on the couch, crunching a piece of celery.
