'unevenly-distributed' originates from the combination of 'unevenly' and 'distributed'. 'Unevenly' comes from 'uneven', which is derived from Old English 'unefen', where 'un-' meant 'not' and 'efen' meant 'even'. 'Distributed' comes from Latin 'distribuere', where 'dis-' meant 'apart' and 'tribuere' meant 'to assign'.

'Unevenly-distributed' evolved from the combination of 'unevenly' and 'distributed', which were used separately in Middle English and later combined in modern English.

Initially, 'unevenly' meant 'not level or smooth', and 'distributed' meant 'to divide among several'. Over time, the combined term evolved to mean 'not equally spread out'.