well-improved
/ˌwɛlɪmˈpruːvd/adjective
Originally: †that has been turned to good account (obsolete ). In later use: greatly improved; that has been made considerably better.
Origin
Mid 17th century; earliest use found in Josias Shute (bap. 1588, d. 1643), Church of England clergyman. From well + improved.