illegal
illegitimate
illicit
irregular
lawless
outlaw
wide-open
wrongful
aberrant
abnormal
abominable
actionable
against the law
anarchic
anarchistic
anomic
atrocious
banned
barred
black-market
bootleg
chargeable
contraband
contrary to law
criminal
delinquent
deviant
disgraceful
evil
exceptionable
felonious
flawed
forbade
forbid
forbidden
hardly the thing
ignominious
impermissible
improper
inappropriate
incorrect
indecorous
infamous
iniquitous
interdicted
intolerable
justiciable
nefarious
nonconstitutional
nonlegal
clandestine
fraudulent
immoral
lawful
sinful
treasonable
unauthorized
unconstitutional
unjust
unjustifiable
unwarrantable
wicked
awful