The word "coupe" (often spelled coupé in British English) entered the language around 1834, borrowed from French coupé, the past participle of couper (to cut). The name described a specific type of horse-drawn carriage that had been "cut" — that is, shortened by removing the rear passenger compartment. Where a standard coach seated four passengers face-to-face, the coupé retained only the front-facing seat, creating a shorter, lighter, more elegant vehicle for one or two passengers.
The French verb couper (to cut) has a surprising etymology. It derives from coup (a blow, a strike), which descended through Medieval Latin colpus from Late Latin colaphus, itself borrowed from Greek kolaphos (a slap, a blow). The semantic development from "a blow" to "to cut" is logical — cutting is a form of striking — but the journey from an ancient Greek slap to a modern sports car is one of etymology's longer chains.
The carriage coupé emerged in 18th-century France as a fashionable alternative to the full-sized berline or coach. Its compact proportions made it nimble in crowded city streets, while its enclosed design offered protection from weather and privacy for its occupants. The coupé became particularly associated with evening social calls and theatre visits — occasions where a smaller, more discreet vehicle was appropriate.
When the automobile replaced the horse-drawn carriage in the early 20th century, the terminology transferred with remarkably little adaptation. A coupe automobile retained the essential characteristics of its horse-drawn predecessor: a shorter body, seating for two (or a small rear bench), and an emphasis on style over passenger capacity. The distinction between coupe and sedan mirrors the old distinction between coupé and berline.
Modern automotive usage has stretched the definition considerably. Four-door vehicles with sloping rooflines are now marketed as "four-door coupes" — a contradiction in terms by historical standards, since the whole point of cutting a coach was to reduce its length and doors. The industry term has shifted from describing a structural modification (cutting) to evoking a style (sporty, sleek, low-roofed).
The French verb couper generated several other English borrowings. "Coupon" comes from couper because bond coupons were physically cut from the bond certificate to redeem interest payments. "Coup" (as in coup d'état) preserves the original sense of a decisive blow. "Coppice" and its contraction "copse" share the same deep root through the cutting