archvillain

• arch-villain

From arch- (“chief, most extreme”) +‎ villain.

• (Received Pronunciation) IPA^(key): /ˌɑːtʃˈvɪlən/
• (General American) IPA^(key): /ˌɑɹt͡ʃˈvɪlən/
• Rhymes: -ɪlən

archvillain (plural archvillains)

1. (chiefly narratology) A supreme villain; the most evil or powerful villain.
   • 2009 January 6, Clyde Haberman, “We Know About the Mess. Please, Clean Up Carefully.”, in New York Times‎^[1]:

     Madoff is the season's archvillain, accused of having run a Ponzi scheme so vast that future generations may well describe similar swindles as Madoff schemes.

• supervillain