down-payment

The term 'down-payment' is a transparent compound formed within Modern English from the native adverb/adjective 'down' and the noun 'payment', which entered English via French from Latin. The logic of the word is straightforward and literal: a 'payment' made 'down,' at the beginning of a transaction, to reduce the outstanding balance. The use of 'down' to mean "initial" or "at the outset" is an idiomatic extension of its sense of being the first or foundational part of something, akin to putting something 'down' as a foundation. This commercial term perfectly illustrates how English combines familiar native and borrowed elements to create precise, functional vocabulary for financial contexts.

Structure: down (lower/initial) + payment (act of paying) - down: From Old English dūne, short for of dūne "from the hill," related to the adverb/adjective 'down'. In this compound, it functions as an adjective meaning "initial" or "made at the outset." - payment: From Anglo-French paiment, Old French paiement, from paier "to pay," from Latin pacāre "to pacify, satisfy (a creditor)." It functions as the head noun, meaning "the act of paying."