illegally
adv. manneradv. in a way that breaks the law. You use this when someone does something that is not allowed by the government or official rules.
adv. in a manner that contravenes established law or official regulations.
He was fined for parking his car illegally.
The company was caught dumping waste illegally into the river and faced a massive fine.
While the protesters claimed their actions were morally justified, the court ruled that they had entered the private facility illegally and were liable for damages.
From illegal + -ly or il- + legally.
Typically placed after the verb or at the end of the clause; can also precede the past participle in passive constructions.
He was arrested for drive illegallyHe was arrested for driving illegallyWhen following a preposition like 'for', the action must be a gerund (-ing form), not the base verb.