degenerative
adjective /dɪˈdʒenərətɪv/
  /dɪˈdʒenərətɪv/
(specialist)- (of an illness) getting or likely to get worse as time passes- degenerative diseases such as arthritis
 Oxford Collocations DictionaryDegenerative is used with these nouns:- arthritis
- condition
- disease
- …