'unevenly-blended' originates from the combination of 'unevenly' and 'blended', where 'unevenly' is derived from 'uneven', meaning 'not level or smooth', and 'blended' is the past participle of 'blend', meaning 'to mix'.

'unevenly-blended' evolved from the Middle English word 'blenden', which meant 'to mix', combined with 'unevenly', which has been used since the 14th century to describe something not level or smooth.

Initially, 'blend' meant 'to mix', and 'unevenly' meant 'not level'. Together, they describe a mixture that is not uniform.