'unidentified' originates from the prefix 'un-' meaning 'not' and the word 'identify', which comes from Latin 'identificare', where 'ident-' meant 'same' and 'facere' meant 'to make'.

'identify' changed from the Latin word 'identificare' and eventually became the modern English word 'identify'.

Initially, it meant 'to make the same', but over time it evolved into its current meaning of 'to recognize or establish as being a particular person or thing'.