Correct Answer: Illicite

Solution : The correct choice is the first option.

The incorrectly spelled word is illicite. The correct spelling is illicit. The vowel 'e' is extra in the incorrect spelling.

Illicit: It means something forbidden by law, rules, or custom.

The meanings of the other words are:

• Illegal: It is the correct spelling, meaning contrary to or forbidden by law.
• Impunity: It is the correct spelling, meaning exemption from punishment or freedom from the injurious consequences of an action.
• Illegible: It is the correct spelling, meaning it is difficult or impossible to read.

Therefore, the correct form is illicit.