Necrosis (noun)

1. The death of cells or tissues in a localized area of the body, usually as a result of disease, injury, or infection.
2. The process of decay or decomposition of dead tissue.

Origin:

Derived from the greek word 'nekros' meaning 'dead body' or 'corpse'.

Examples:

1. The necrosis of the tissue in the affected area was causing pain and swelling.
2. The necrosis of the cells in the organ was causing it to lose function.
3. The necrosis of the bone was caused by a lack of blood flow to the area.
4. The necrosis of the skin was a serious complication of the burn injury.
5. The necrosis of the muscle was causing it to shrink and become non-functional.