dual-use

The compound adjective "dual-use" is a modern formation, directly combining the English words "dual" and "use." "Dual" traces back to the Latin duo (two), via the adjective dualis, which entered English in the 17th century to signify anything consisting of two parts or having a double character. "Use" originates from the Latin noun usus, meaning act of using, practice, or utility, which passed into English through Old French. The term's logic is transparently literal, denoting an object or technology possessing two distinct functions or applications. Its contemporary prominence stems from strategic and trade contexts, where it specifically describes goods or technologies that serve both ordinary civilian and potential military purposes.

Structure: dual (two) + use (purpose) - dual: From Latin dualis (containing two, relating to two). Functional role: Adjective-forming root indicating the number two. - use: From Old French us, from Latin usus (act of using, custom). Functional role: Noun root indicating purpose, function, or application.