'harmoniously-mixed' originates from the combination of 'harmonious' and 'mixed'. 'Harmonious' comes from the Greek word 'harmonia', meaning 'agreement or concord', and 'mixed' from the Latin 'miscere', meaning 'to mix'.

'Harmonious' changed from the Old French word 'armonieux' and eventually became the modern English word 'harmonious'. 'Mixed' evolved from the Old English 'miscian', which was influenced by the Latin 'miscere'.

Initially, 'harmonious' meant 'in agreement or concord', and 'mixed' meant 'to combine'. Over time, 'harmoniously-mixed' evolved to describe things blended together in a pleasing manner.