'systematically-separated' originates from the combination of 'systematic' and 'separate', where 'systematic' comes from the Greek 'sustēma' meaning 'organized whole', and 'separate' from Latin 'separare' meaning 'to divide'.

'Systematic' evolved from the Greek 'sustēma' through Latin 'systematicus', while 'separate' transformed from Latin 'separare' to the modern English 'separate'.

Initially, 'systematic' meant 'pertaining to a system', and 'separate' meant 'to divide'. The combined term 'systematically-separated' retains these meanings in a modern context.