'unequally-split' originates from the combination of 'unequal' and 'split', where 'unequal' means 'not equal' and 'split' means 'to divide'.

'unequal' changed from the Old English word 'unequal' and 'split' from the Middle English word 'splitten', eventually forming the modern English term 'unequally-split'.

Initially, 'unequal' meant 'not equal', and 'split' meant 'to divide'. Over time, the combined term 'unequally-split' evolved to specifically describe divisions that are not fair or balanced.