The words elicit and illicit sound similar, but they mean very different things!
Illicit means forbidden or unlawful; elicit is similar to evoke and means “to draw out.”
(verb): The announcement elicited cheers from the crowd.
Jack made a funny face, hoping to elicit a smile from Jennifer.
(adjective): The illicit photographs were removed soon after they were posted on the site.
Her illicit activities led to her downfall.
Licit is a word that means “permissible”; hence, with the addition of the prefix il- the meaning changes to not permissible, as with words such as illegal and illogical.