'unqualified' originates from the prefix 'un-' meaning 'not' and the word 'qualified' from Latin 'qualificare', where 'qualis' meant 'of what kind' and 'facere' meant 'to make'.

'qualificare' transformed into the Old French word 'qualifier', and eventually became the modern English word 'qualified'. The prefix 'un-' was added to form 'unqualified'.

Initially, it meant 'not made of a certain kind', but over time it evolved into its current meaning of 'not having the necessary qualifications'.