Synonyms for Punic (same or very similar meaning)
WordNet sense 1 (of or relating to or characteristic of ancient Carthage or its people or their language):
CarthaginianWordNet sense 2 (tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans):
perfidious, treacherousWordNet sense 3 (not true to duty or obligation or promises):
unfaithfulFrom the ODE community, based on WordNetadd/edit