The dish and the pepper.
One of America's favorite foods is "chili" or "chili con carne"…chili with meat. Most Americans know it with beans, but Texans insist that beans have no place in chili.
The most common spelling is "chili," but other options include "chilli," "chilie," and "chile". The peppers that are the key ingredient in "chili" are spelled differently…"chile" or "chiles".
So how did this dish, made with chiles, become so commonly called "chili"? Maybe it's the Americanization of a Mexican term for pepper; we just don't know or care how to pronounce things properly. But that's only a guess. Cha Cha Cha.