'disqualified' originates from the prefix 'dis-' meaning 'not' and the word 'qualify', which comes from the 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 'qualify'. The prefix 'dis-' was added to form 'disqualify', and its past participle form is 'disqualified'.

Initially, 'qualify' meant 'to make of a certain kind', but over time, 'disqualify' evolved to mean 'to declare ineligible'.