'accurate' originates from Latin, specifically the word 'accuratus,' where 'ad-' meant 'toward' and 'cura' meant 'care.' 'Calculate' originates from Latin, specifically the word 'calculare,' where 'calculus' meant 'small stone used for counting.'

'accuratus' transformed into the French word 'accurate,' and eventually became the modern English word 'accurate' through Middle English. 'Calculare' transformed into the French word 'calculer,' and eventually became the modern English word 'calculate.'

Initially, 'accurate' meant 'done with care,' but over time it evolved into its current meaning of 'correct and precise.' 'Calculate' initially meant 'to count or reckon,' and this meaning has largely remained the same in modern usage.