'precisely' originates from Latin, specifically the word 'praecisus,' where 'prae-' meant 'before' and 'caedere' meant 'to cut.' 'Described' originates from Latin, specifically the word 'describere,' where 'de-' meant 'down' and 'scribere' meant 'to write.'

'precisely' changed from the Old French word 'precis' and eventually became the modern English word 'precisely.' 'Described' transformed from the Old French word 'descrire' and eventually became the modern English word 'describe.'

Initially, 'precisely' meant 'cut short,' but over time it evolved into its current meaning of 'exactly.' 'Described' has largely retained its original meaning of 'to write down or explain.'