degenerate
(adj) : (of qualities) having deteriorated, degraded or fallen from normal, coherent, balanced and desirable to an undesirable and typically abnormal; (of a human or system) having lost good or desirable qualities
"the genetic code is degenerate because a single amino acid can be coded by one of several codons."
(n) : one is degenerate, who has fallen from previous stature
"you are a degenerate, boy. You're a disgrace to your ancestors."
(v) : (of humans or systems) to lose good or desirable qualities;
"his condition continued to degenerate even after admission to hospital."