deterioration
//dɪˌtɪəriəˈreɪʃən//
Noun
deteriorationSingular
deteriorationsPlural
1
The process of becoming progressively worse or less valuable in quality, condition, or function.
The deterioration of the old building has become a serious concern for the city.
2
A decline or worsening in health, mental faculties, or physical state.
The doctor noticed a gradual deterioration in the patient's memory.