client

The word 'client' entered English in the late 14th century via Old French 'client', which itself derived from the Latin 'cliens' (genitive 'clientis'), meaning a dependent, follower, or vassal. This Latin term is believed to originate from a variant of the verb 'cluere', meaning 'to hear, obey, or be called', suggesting a relationship based on listening and following instructions. The core logic of dependency and service evolved from the ancient Roman patron-client social system into the modern professional context, where a client is one who seeks and follows the advice or services of another. The computing sense emerged in the 1970s by analogy, where a software entity depends on and requests services from a central resource.

The word 'client' is a simplex loanword from Latin. It does not contain separable morphemes in its modern English spelling that are productive for learners.