Similar words
strafbar
Illegal is the general word for illegal; strafbar specifically means punishable by law.
Similar in other languages
French
illégal
illégal is the French word for the same thing — both mean "illegal."
Portuguese
ilegal
ilegal is the Portuguese word for the same thing — both mean "illegal."
Practice
1 What does illegal mean?
illegal
2 Fill the gap: Das Parken ist hier ___.
Full sentence: Das Parken ist hier illegal. (Parking here is illegal.)
3 Which fingerprint chart matches illegal?
illegal: neutral register, common frequency, legal domain, neutral connotation.