'client-initiated' originates from the combination of 'client' and 'initiate,' where 'client' refers to a person or organization using the services of a professional person or company, and 'initiate' means to begin or start.

'client' and 'initiate' have been used separately in English for centuries, but their combination into 'client-initiated' is a modern development, particularly in the context of technology and business.

Initially, 'initiate' meant 'to begin or start,' and this meaning has largely remained the same in modern usage, with 'client-initiated' specifically referring to actions started by clients.