degenerate

Short definition from Wiktionary

Adjective

1. 1
   Having deteriorated, degraded or fallen from normal, coherent, balanced and desirable to undesirable and typically abnormal.
2. 2
   Having lost good or desirable qualities; hence also having bad character or habits, base, immoral, corrupt.
3. 3
   Having lost functionality in general.
4. 4
   Having multiple domain elements correspond to one element of the range.
5. 5
   Qualitatively different, usually simpler, than typical objects of its class.
6. 6
   Having multiple different (linearly independent) eigenvectors.
7. 7
   Having the same quantum energy level.

Noun

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

Verb

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