'unmatched' originates from the prefix 'un-' meaning 'not' and the word 'match' from Old English 'mæċċan', meaning 'to match or equal'.

'mæċċan' transformed into the Middle English word 'matchen', and eventually became the modern English word 'match'.

Initially, it meant 'to equal or correspond', but over time it evolved into its current meaning of 'having no equal'.