The phrase 'completely-refurbished' is formed from the adverb 'completely' (from Latin 'completus', meaning 'filled up') and the past participle 'refurbished' (from 'refurbish', from Old French 'refurbir', meaning 'to polish up again').

'Refurbish' comes from Old French 'refurbir', which became 'refurbish' in Middle English, and 'completely' comes from Latin 'completus', entering English via Old French as 'complet' and then 'complete'. The phrase 'completely-refurbished' is a modern English compound adjective.

Initially, 'refurbish' meant 'to polish up again', but over time it evolved to mean 'to renovate or restore to a good condition'. Adding 'completely' emphasizes the thoroughness of the restoration.