This is the 13662nd most frequent Russian word.
нелегальные
"Illegal."
The term 'нелегальные' describes software obtained or distributed in violation of regulations or laws.
Некоторые люди купили нелегальные программы для компьютера.
Some people bought illegal programs for the computer.
Here 'нелегальные' is used to denote actions that violate legal standards.
Нелегальные действия могут привести к серьёзным последствиям.
Illegal actions can lead to serious consequences.
In this sentence, 'нелегальные' characterizes individuals residing or moving without legal authorization.