'non-event' originates from the prefix 'non-' meaning 'not' and the word 'event,' which comes from Latin 'eventus,' meaning 'outcome' or 'occurrence.'

'eventus' transformed into the Old French word 'event,' and eventually became the modern English word 'event.' The prefix 'non-' was added to form 'non-event.'

Initially, 'event' meant 'outcome' or 'occurrence,' but 'non-event' evolved to mean an occurrence that is insignificant.