An archenemy, archfoe, archvillain, or nemesis (sometimes spelled arch-enemy, arch-foe, or arch-villain originated around the mid-16th century) is the principal enemy of someone or something. In fiction, it is a character who is the hero/protagonist's worst enemy.
- "archenemy definition". Dictionary.com. Archived from the original on 5 October 2008. Retrieved 7 September 2008.
- "archenemy – Definition from the Merriam-Webster Online Dictionary". Merriam-Webster. Retrieved 26 June 2008.
- Wicaksono, Rachel. "BBC World Service | Learning English | Ask about English". BBC. Retrieved 26 June 2008.