Medical Terminology - Encephalitis
Encephalitis - inflammation of the brain. In one way or the other, encephalitis sounds way, way better than the simple words 'inflammation of the brain'.
The end of the word, which is -itis, means inflammation. You can see this everywhere, for instance 'cystitis' means bladder inflammation.
Enchephalo on the other hand comes from way deep, from Greek again. The word enkephalosconsists of 'en-' which means in and 'kephale', which is Greek for head. So enchephalos means brain, because those are in the head!