'accurately-separated' is a compound word formed from 'accurately' and 'separated'. 'Accurately' originates from Latin, specifically the word 'accuratus', where 'ad-' meant 'to' and 'cura' meant 'care'. 'Separated' comes from Latin 'separatus', the past participle of 'separare', where 'se-' meant 'apart' and 'parare' meant 'prepare'.

'Accuratus' transformed into the Old French word 'acurat', and eventually became the modern English word 'accurate'. 'Separatus' transformed into the Old French word 'separer', and eventually became the modern English word 'separate'.

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