'unequally-divided' originates from the combination of 'unequal' and 'divide', where 'un-' is a prefix meaning 'not', 'equal' from Latin 'aequalis' meaning 'even, level', and 'divide' from Latin 'dividere' meaning 'to separate'.

'unequal' changed from the Old French word 'inequal' and 'divide' from the Latin 'dividere', eventually forming the modern English term 'unequally-divided'.

Initially, 'divide' meant 'to separate into parts', and 'unequal' meant 'not equal'. Over time, 'unequally-divided' evolved to describe something apportioned in an unfair manner.