The word "coupon" entered English in 1822 from French coupon, meaning a piece cut off. The French word derives from couper (to cut), which traces back through coup (a blow) to Late Latin colpus and ultimately to Greek kolaphos (a slap). The etymological chain from a Greek slap to a modern grocery discount runs through the physical act of cutting.
The original coupons were financial instruments, not marketing tools. In the 18th and 19th centuries, bonds were issued as physical certificates printed on heavy paper. Along the edge or bottom of each certificate was a series of small dated certificates — the coupons — each representing one interest payment. On the designated date, the bondholder would cut off the appropriate coupon with scissors
The financial coupon system also produced the term "coupon clipper" — a pejorative expression for someone who lives off investment income without working. The image of a wealthy person sitting in a drawing room with scissors, snipping coupons from bonds, became a symbol of idle privilege in the 19th and early 20th centuries. F. Scott Fitzgerald and other writers of the period used the term as shorthand for inherited wealth.
The marketing coupon — a voucher offering a discount on a purchase — emerged in the late 19th century. The Coca-Cola Company is often credited with distributing the first modern promotional coupons in 1887, offering free glasses of the new beverage. The logic of the name transferred naturally: just as a bond coupon was a piece cut from a larger document and exchanged for value, a promotional coupon was cut from a newspaper or flyer and exchanged for a discount.
The word's pronunciation in English reveals its French origin. Most English speakers say /ˈkuː.pɒn/, preserving the French vowel sound, though the variant /ˈkjuː.pɒn/ is common in some American dialects. The word has resisted anglicization more than many French borrowings, perhaps because it entered English relatively recently and maintained its French orthography.
Digital coupons have eliminated the cutting entirely, but the vocabulary persists. Websites offer "e-coupons," shoppers "clip" digital coupons to their loyalty cards, and the bond market still speaks of coupon rates. The word has completely detached from its physical referent — no one cuts anything — yet the metaphor of separation and exchange embedded in the French original remains semantically transparent.