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illegal
Not allowed by law or rules.
illegality
The state of being against the law.
illegally
In a way that breaks the law.
illegible
Difficult or impossible to read.
illegitimate
Not authorized by law or rules.
illicit
Forbidden by law or rules.
Illini
Nickname for the University of Illinois teams.
illiteracy
Inability to read or write.
illiterate
Unable to read or write.
illness
A condition affecting health.
illogical
Not making sense; unreasonable.
illuminate
to light up or make something clear
Illuminati
A group often associated with conspiracy theories.
illumination
The act of lighting up or brightening.
illusion
A false idea or misleading appearance.
illusory
Appearing to be real but actually false.
illustrate
to make something clear by showing examples
illustration
A picture or diagram that explains something.
illustrative
Serving as an example or explanation.
illustrator
A person who creates images for books.
illustrious
Famous and admired for achievements.
ILS
A system that guides aircraft to land.
ima
A slang abbreviation for 'I am going to'.
image
mental picture or representation of something