illicitly
US /ɪˈlɪs.ɪt.li/
UK /ɪˈlɪs.ɪt.li/

1.
illicitement, illégalement
in a manner disapproved of or not allowed by custom or law
:
•
He was accused of illicitly importing goods.
Il a été accusé d'importer des marchandises illicitement.
•
They were meeting illicitly in secret locations.
Ils se rencontraient illicitement dans des lieux secrets.