Here are some examples:
* Arteriosclerosis: Hardening of the arteries.
* Atherosclerosis: A type of arteriosclerosis characterized by plaque buildup in the arteries.
* Scleroderma: A disease characterized by hardening of the skin.
* Osteosclerosis: Increased density of bone.
* Scleritis: Inflammation of the sclera, the white outer layer of the eye.
So, whenever you see "-sclero" in a word, think of it as a sign that something is becoming harder or stiffer.