'unfrequented' originates from the prefix 'un-' meaning 'not' and the word 'frequented,' which comes from Latin 'frequentare,' meaning 'to visit often.'

'frequentare' transformed into the Old French word 'frequenter,' and eventually became the modern English word 'frequented,' with 'un-' added to form 'unfrequented.'

Initially, it meant 'not visited often,' and this meaning has largely remained the same in modern usage.