What does arithis mean in simple terms?

Arithis or Arthritus? Because Arithis isn't a word. However, if you want a simple term of Arthritus, it is something that can be diagnosed that happens in your bones. The cause of this is cartilage.

If you are trying to spell arthritis that's joint inflammation. it's a disease that effects the joint tissues in your body. It makes your joints very stiff and its painful