'unchartered' originates from the prefix 'un-' meaning 'not' and the word 'chartered,' which comes from the Latin 'chartula,' meaning 'a little paper or map.'

'chartered' changed from the Old French word 'charte' and eventually became the modern English word 'chartered.'

Initially, it meant 'not having a charter or map,' but over time it evolved into its current meaning of 'not recorded or mapped on a chart or map.'