What is the specific offense for which Master Adam is punished?

Master Adam is punished for counterfeiting in Dante's "Inferno." In the context of the narrative, he is found in the Eighth Circle of Hell, which is designated for fraudulent acts. Counterfeiting, specifically, refers to the act of producing false currency or imitations, which was considered a severe offense in Dante’s time, as it undermined the economy and trust in the monetary system. This form of deceit directly aligns with the themes of fraud and dishonesty explored throughout the text, highlighting the moral consequences of such actions in the afterlife. Dante portrays counterfeiting as a grave sin, deserving of significant punishment, as it violates both divine and social order.