degeneration

باللغة العربية: تَنَكُّس، انحطاط، تَدَهْوُر

1. The process or state of growing worse, or the state of having become worse. (countable, uncountable)
2. That condition of a tissue or an organ in which its vitality has become either diminished or perverted; a substitution of a lower for a higher form of structure. (uncountable) · fatty degeneration of the liver
3. Gradual deterioration, from natural causes, of any class of animals or plants or any particular organ or organs; hereditary degradation of type. (uncountable)
4. A thing that has degenerated. (countable)

الجمع degenerations