Venal

venal \ˈvē-nəl\ adjective: 1. capable of being bought or obtained for money or other valuable consideration; purchasable, 2. open to corrupt influence and especially bribery; mercenary, {a venal legislator},
3. originating in, characterized by, or associated with corrupt bribery {a venal arrangement with the police}

Etymology: Latin venalis, from venum sale (accusative)

Venal leads to penal.