'unmodified' originates from the prefix 'un-' meaning 'not' and the word 'modify' from Latin 'modificare', where 'modus' meant 'measure' and 'facere' meant 'to make'.

'modificare' transformed into the French word 'modifier', and eventually became the modern English word 'modify', with 'unmodified' being formed by adding the prefix 'un-'.

Initially, 'modify' meant 'to make a measure', but over time it evolved into its current meaning of 'to change or alter'.