single-user

The compound adjective "single-user" is a modern formation from two distinct English words. "Single" traces back to the Latin singulus, meaning "one, individual, separate," which itself may derive from the Proto-Indo-European root sem- meaning "one." "User" originates from the Old English verb usian (to use), with the agent suffix "-er" denoting a person who performs an action. The combination, following the common English pattern of adjective-noun compounding, logically creates a term that literally means "for one user," directly describing systems, software, or licenses intended for exclusive individual operation.

Structure: single (one) + user (person who uses) - single: From Latin singulus (one, individual). Functional role: Adjective root meaning "one". - user: From Old English usor (agent noun from usian, to use). Functional role: Noun root meaning "one who uses".