'promptly-done' originates from the English word 'promptly,' which means 'quickly' or 'without delay,' and 'done,' which means 'completed.'

'Promptly' and 'done' have been used in English since the Middle Ages, with 'promptly' deriving from the Latin 'promptus,' meaning 'ready,' and 'done' from the Old English 'don,' meaning 'to do.'

Initially, 'promptly' meant 'ready' or 'prepared,' but over time it evolved to mean 'quickly' or 'without delay.' 'Done' has consistently meant 'completed.'