The Nahuatl word for avocado that forms part of “guacamole” is āhuacatl, commonly written without diacritics as ahuacatl. The word entered Spanish as aguacate and eventually became the English “avocado.”
“Guacamole” comes from Classical Nahuatl āhuacamōlli, meaning an avocado sauce or avocado preparation. It combines āhuacatl, “avocado,” with mōlli, meaning sauce or mole. Nahuatl was spoken by the Mexica and remains a living language family in Mexico today.
A common mix-up comes from claims that āhuacatl literally means “testicle sauce.” The avocado word was associated with that body part through shape and euphemistic usage, but the established food etymology of guacamole is avocado plus sauce. The other options are separate Nahuatl-derived food words or ingredients: chilli means chile, tōmatl is tomato, and mōlli means sauce or mole.