jargon

Picture a medieval French bird—or perhaps merely a noisy human imitator—filling the air with meaningless chatter. Old French called that racket jargon, a word probably born from sound itself and often compared with Latin garrire, “to chatter.” By the 1340s, English had borrowed it as jargoun or jargon for gibberish, and in the 1640s it could describe mixed speech or pidgin. A decade later, the word moved into the offices, workshops, and secretive circles of specialists, where unfamiliar terms made ordinary listeners feel as if they had wandered into a private language club. That double life remains: jargon can be the precise vocabulary that lets experts communicate quickly—or a verbal fog machine used to sound impressive while saying very little.