| illegal(adjective, illegitimate, unlawful, prohibited, illicit) |
| black-market(irregular, unwarranted, criminal, illegal, illegitimate) |
| criminal(irregular, unwarranted, illegal, illegitimate, unlawful) |
| extralegal(irregular, unwarranted, criminal, illegal, illegitimate) |
| illicit(irregular, unwarranted, criminal, illegal, illegitimate) |
| not approved(expression, irregular, unwarranted, criminal, illegal) |
| outlawed(irregular, unwarranted, criminal, illegal, illegitimate) |
| outside the law(expression, irregular, unwarranted, criminal, illegal) |
| racket(irregular, unwarranted, criminal, illegal, illegitimate) |
| under the table(expression, irregular, unwarranted, criminal, illegal) |
| unlicensed(irregular, unwarranted, criminal, illegal, illegitimate) |
| unwarrantable(irregular, unwarranted, criminal, illegal, illegitimate) |
| another |
| contrary to law(expression, idiom, illegal, illicit) |
| error |
| in violation of law(expression, idiom, illegal, illicit) |
| indictable(illegal, illicit, unsanctioned, unapproved) |
| out of line(expression, idiom, illegal, illicit, unsanctioned) |
| trespass |
| twisted |