Another entry in the Archenemy/Archnemesis camp

Thanks to @thatwhichmatters via @jough

ENEMY/NEMESIS? [1/2] Enemy: unfriendly/hostile person. Nemesis: avenging force. ARCH- indicates most significant among several enemies.

https://twitter.com/thatwhichmatter/status/5362326203

I think my nemesis is his/her enemy and vice versa, but more important is to keep this vital discussion going!