The term 'efficiently-separated' combines 'efficiently,' from Latin 'efficientem,' meaning 'accomplishing,' and 'separated,' from Latin 'separatus,' meaning 'to divide.'

'Efficiently' evolved from the Latin 'efficientem' through Old French 'efficient,' while 'separated' came from Latin 'separatus' through Middle English 'separaten.'

Initially, 'efficiently' meant 'accomplishing effectively,' and 'separated' meant 'divided.' Together, they now imply a division done with maximum efficiency.