discountdiscount

Discount is an alteration of French descompte, from Old French desconter ‘reckon off’, from Medieval Latin discomputō, from Latin computō ‘to reckon’.

1. Latinc. 75 BCE–200 CEcomputō¹‘to reckon, count’
2. Medieval Latinc. 600–1500discomputō¹‘to deduct, discount’
3. Old Frenchc. 842–1400desconter¹‘reckon off, account back, discount’
4. Frenchc. 1600–presentdescompte¹
5. Englishearliest quotation 1692discount¹

1. ¹ Wiktionary, English discount
2. Earliest quotation in Wiktionary’s entry: 1692, William Walsh: “Discount only unexceptionable paper.”.