DEGENERATE

noun

1. One who is degenerate, who has fallen from previous stature; an immoral person.

verb

1. To lose good or desirable qualities.
2. To cause to lose good or desirable qualities.

adjective

1. (of qualities) Having deteriorated, degraded or fallen from normal, coherent, balanced and desirable to undesirable and typically abnormal.
2. (of a human or system) Having lost good or desirable qualities.
3. (of an encoding or function) Having multiple domain elements correspond to one element of the range.