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"an illegal chess move"adjectiveprohibited by law or by official or accepted rules
Similar:
black-market bootleg contraband criminal dirty embezzled extrajudicial extralegal felonious hot ill-gotten illegitimate illicit ineligible misappropriated misbranded mislabeled nonlegal outlaw outlawed penal prohibited punishable smuggled under-the-counter unlawful unratified amerciable banned blackOpposite:
Synonyms & Similar Words
hot black dirty criminal banned prohibited smuggled outlaw penal irregular illegitimate illicit unlawful contraband outlawed punishable bootleg embezzled felonious illegality ineligible mislabeled extrajudicial misappropriated extralegal black-market ill-gotten misbranded nonlegal under-the-counter unratified amerciable