'client-centered' originates from the combination of 'client' and 'centered', where 'client' refers to a person using the services of a professional, and 'centered' means focused or concentrated on.

The term 'client-centered' evolved from the concept of 'client' in the 20th century, emphasizing the importance of focusing on the client's needs in various professional fields.

Initially, it meant focusing on the client's needs, and this meaning has remained consistent in modern usage.