'undisturbed' originates from the prefix 'un-' meaning 'not' and the word 'disturbed' from Latin 'disturbare', where 'dis-' meant 'apart' and 'turbare' meant 'to throw into disorder'.

'disturbare' transformed into the Old French word 'destorber', and eventually became the modern English word 'disturb', with 'undisturbed' forming as a negation.

Initially, it meant 'not thrown into disorder', and this meaning has largely remained the same in modern usage.