'inconsistently-separated' originates from the combination of 'inconsistent' and 'separated'. 'Inconsistent' comes from Latin 'inconsistens', where 'in-' meant 'not' and 'consistens' meant 'standing firm'. 'Separated' comes from Latin 'separatus', where 'se-' meant 'apart' and 'parare' meant 'prepare'.

'Inconsistently-separated' evolved from the combination of the words 'inconsistent' and 'separated', which have been used in English since the 16th century.

Initially, 'inconsistent' meant 'not standing firm', and 'separated' meant 'set apart'. Over time, the combined term 'inconsistently-separated' came to describe something not consistently divided.