You searched for: “archenemy”
archenemy (s) (noun), archenemies (pl)
A chief foe or someone's main or worst rival: In the medieval adventure story Greg was reading, the king and his knights were fighting the archenemy of their land.

For most people, the principle archenemy of their health is cancer.

This entry is located in the following units: ami-, amic- (page 1) arch-, archi-, -arch (page 1) archaeo-, archeo-, archae-, arche-, archa-, archi-, -arch (page 4)
Word Entries at Get Words: “archenemy”
archenemy
Chief, or main, enemy.

Disease is the archenemy of mankind.

This entry is located in the following unit: arch- (page 1)