Sclerosis (noun)

1. A medical condition in which a tissue or organ becomes hard and stiff due to abnormal growth of cells.
2. A pathological hardening or stiffening of tissue or organs.

Origin:

Derived from the greek word 'skleros' meaning hard or stiff.

Examples:

1. Multiple sclerosis is a type of sclerosis that affects the central nervous system.
2. The sclerosis of the liver caused by cirrhosis can be treated with medication and lifestyle changes.
3. The patient was diagnosed with scleroderma, a type of systemic sclerosis affecting the skin and internal organs.
4. The patient's condition worsened due to the progressive sclerosis of their heart.
5. The patient's symptoms improved after undergoing treatment for their pulmonary sclerosis.