'masterfully-done' originates from the combination of 'masterfully' and 'done', where 'masterfully' is derived from 'master' meaning 'a person with the ability or power to use, control, or dispose of something' and the suffix '-fully' indicating 'in a manner of'.

'masterfully' evolved from the Old English 'mægester' meaning 'teacher' and 'done' from the Old English 'don' meaning 'to perform or execute'.

Initially, 'masterfully' meant 'in a manner of a master', and 'done' meant 'completed'. Together, they evolved to mean 'completed with great skill'.