'greatness' originates from Old English, specifically the word 'grēatnes,' where 'grēat' meant 'large' or 'big.'

'grēatnes' transformed into the Middle English word 'gretnes,' and eventually became the modern English word 'greatness.'

Initially, it meant 'large size or extent,' but over time it evolved into its current meaning of 'distinguished quality or eminence.'