The subject of this post is directly derived from a debate that I had with my children. You should know that 2/3 of my children are six. If you have an arch nemesis, you have a singular enemy. You say something like, “lactose is my nemesis.” It is completely possible to have enemies that are equally evil but not on the level of an arch nemesis. This is not the big boss at the end of the game. It’s several bad guys coming at you all at once that are just below the strength level of an arch-nemesis. You would say, “gluten and lactose are my nemesises.” Or should it be nemesi? Nemesaries? Nememies?