'fourscore' originates from Old English, specifically the word 'feowertig,' where 'feower' meant 'four' and 'tig' meant 'ten.'

'feowertig' transformed into the Middle English word 'fourscore,' and eventually became the modern English word 'fourscore.'

Initially, it meant 'four times twenty,' but over time it evolved into its current meaning of 'eighty.'