The word “avocado” traces back to the Nahuatl word āhuacatl, used by the Aztecs to describe the fruit. Nahuatl was the language of the Aztec Empire in central Mexico, and the word carried a memorable double meaning: it referred to both the fruit of the avocado tree and, more colloquially, to testicles. The connection was almost certainly about shape, and the dual usage worked much the way “nuts” does in English.
The Nahuatl Root Word
The Aztecs had been eating avocados for thousands of years before any European encountered the fruit. Archaeological evidence from Honduras and Mexico shows humans were harvesting wild avocados as far back as 11,000 years ago, with deliberate cultivation of larger, thicker-skinned fruits beginning around 7,500 years ago. By the time Spanish explorers arrived in the 1500s, the avocado was a dietary staple across Mesoamerica.
The Nahuatl word āhuacatl (sometimes written aoacatl in older sources) did double duty as both a botanical and anatomical term. According to Nahuatl scholar Magnus Pharao Hansen, the “testicle” meaning was more of a slang usage, similar to how English speakers use “ball” or “nut” without causing confusion in a grocery store. A Nahuatl speaker asking for āhuacamōlli, the mashed avocado dish we now call guacamole, would not have been making a joke. Context made the meaning perfectly clear.
How Spanish Reshaped the Word
When Spanish conquistadors and explorers encountered āhuacatl, they struggled with the pronunciation. The Nahuatl sounds didn’t map neatly onto Spanish, and the word went through several approximations. Early Spanish speakers in the Americas softened it into ahuacate, then aguacate, which remains the standard Spanish word for avocado today. Back in Spain, the word shifted even further and became abogado, which happened to be the existing Spanish word for “lawyer” or “advocate.”
That overlap with abogado is the critical link to the English word. The Spanish were essentially hearing the Nahuatl term and unconsciously reshaping it into something that sounded like a word they already knew. This kind of linguistic adaptation, where an unfamiliar foreign word gets molded into a familiar-sounding one, is called folk etymology. It’s the same process that turned the Arabic al-kīmiyā into “alchemy” and the Tamil kaṟi into “curry.”
From Spanish to English
English borrowed its version of the word not directly from Nahuatl but from the already-mangled Spanish forms. The jump from abogado or aguacate to “avocado” reflects English speakers doing exactly what the Spanish had done: approximating unfamiliar sounds with familiar ones. By the late 1600s, English writers were using spellings close to the modern “avocado.”
English speakers also invented their own name for the fruit. For much of the 18th and 19th centuries, avocados were commonly called “alligator pears” in English, a reference to the fruit’s bumpy green skin and pear-like shape. The name stuck around in parts of the American South well into the 20th century. California growers eventually pushed hard for “avocado” as the standard term, partly because “alligator pear” didn’t exactly scream appetizing.
Why Guacamole Shares the Same Root
If you’ve ever seen the claim that “guacamole” means “testicle sauce,” it’s technically a stretch. The word comes from āhuacamōlli, a combination of āhuacatl (the fruit) and mōlli (sauce or mixture). Yes, āhuacatl could slangily mean testicle, but the compound word referred straightforwardly to mashed avocado. Calling guacamole “testicle sauce” is about as accurate as saying a “ball game” is a “testicle game.” The double meaning exists, but no one was actually thinking about it.
The journey from āhuacatl to “avocado” crossed three languages, two continents, and roughly 500 years. Each culture that encountered the word reshaped it to fit the sounds and patterns it already knew, until the Nahuatl original became almost unrecognizable. But the core of the word, that first syllable, has survived every transformation.