degenerate
/di-ˈjen-rət/
adjective
having declined or become less specialized (as in nature, character, structure, or function) from an ancestral or former state
having sunk to a condition below that which is normal to a type; especially : having sunk to a lower and usually corrupt and vicious state
degraded
the last degenerate member of a noble family
… fruit so degenerate that the insects weren't even interested …
vicious villainous iniquitous nefarious corrupt degenerate mean highly reprehensible or offensive in character, nature, or conduct. vicious may directly oppose virtuous in implying moral depravity, or may connote malignancy, cruelty, or destructive violence. villainous applies to any evil, depraved, or vile conduct or characteristic.
verb
to pass from a higher to a lower type or condition : deteriorate
to sink into a low intellectual or moral state
to decline in quality
her fixed mysterious smile degenerated into a fatuous stare
noun
social degenerates