chocolate

The Aztecs called it xocolātl—possibly from xococ ("bitter") and ātl ("water"). It was a sacred drink: ground cacao beans mixed with chilies, vanilla, and water, frothed into a bitter foam reserved for royalty and warriors.

When Hernán Cortés brought cacao back to Spain in the 1520s, Europeans couldn't pronounce xocolātl. It became chocolate in Spanish, then spread across Europe—but always as a drink, never a solid.

The Spanish kept the secret for nearly a century. When it finally reached France, England, and the rest of Europe, each culture adapted it: adding sugar, milk, eventually solidifying it into bars in the 1840s.

What the Aztecs would recognize in a modern chocolate bar is almost nothing. But the word persists: a Nahuatl sound echoing through every language on Earth.