'unfinished' originates from the prefix 'un-' meaning 'not' and the word 'finish' from Middle English 'finisshen', which came from Old French 'finir', meaning 'to end or complete'.

'finir' transformed into the Middle English word 'finisshen', and eventually became the modern English word 'finish'.

Initially, it meant 'to bring to an end', but over time it evolved into its current meaning of 'not completed'.