'smoothly-linked' originates from the combination of 'smoothly' and 'linked', where 'smoothly' is derived from 'smooth', meaning 'even or without roughness', and 'linked' from 'link', meaning 'to connect'.

'smoothly' evolved from the Old English word 'smōð', and 'linked' from the Old English 'hlencan', eventually forming the modern English term 'smoothly-linked'.

Initially, 'smoothly' meant 'without roughness', and 'linked' meant 'connected'. Together, they evolved to describe a seamless connection.