The compound adjective "three-martini" is a modern, culturally specific formation from the mid-20th century. It literally combines the cardinal number "three," with ancient Indo-European roots, and "martini," the name of a cocktail popularized in the 19th and 20th centuries. The term does not denote a simple quantity but evokes a specific social ritual—the extended, business-oriented lunch where multiple martinis are consumed. Thus, the logic of the word shifts from a literal count to an abstract descriptor of a lifestyle or state, encapsulating a particular era of corporate culture.

Structure: three (number) + martini (cocktail) - three: From Old English þrīe, þrēo, of Proto-Germanic origin; related to Dutch drie and German drei, from an Indo-European root shared by Latin tres and Greek treis. Functions as a cardinal number. - martini: From the proprietary name Martini, likely from the name of the vermouth brand Martini & Rossi. Functions as the name of a specific cocktail.