'smoothly-presented' originates from the combination of 'smoothly' and 'presented'. 'Smoothly' comes from 'smooth', which originates from Old English 'smōð', meaning 'free from roughness'. 'Presented' comes from Latin 'praesentare', meaning 'to place before'.

'smoothly' evolved from Old English 'smōð' to Middle English 'smoþ', and eventually became 'smoothly'. 'Presented' evolved from Latin 'praesentare' to Old French 'presenter', and eventually became 'presented' in modern English.

Initially, 'smoothly' meant 'free from roughness', and 'presented' meant 'to place before'. Together, they evolved to mean 'presented in a polished manner'.