Definition of "archenemy" []

• A principal enemy. (noun)
• The Devil; Satan. Used with the. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In honor of the holiday, Hawaii Five-0 executive producer Peter Lenkov is giving fans a gift — the introduction of the villainous Wo Fat, Steve McGarrett's archenemy from the original 1968 — 1980 series."
• "“Toby Mawer … isn’t he the fellow you called your archenemy?”"
• "Sending Tanya Vladimova in against his archenemy was a step he had longed to take years ago but could never bring himself to do."