'unprocessed' originates from the prefix 'un-' meaning 'not' and the word 'process' from Latin 'processus', meaning 'a going forward'.

'processus' transformed into the French word 'processer', and eventually became the modern English word 'process'.

Initially, 'process' meant 'a series of actions or steps taken in order to achieve a particular end', and 'unprocessed' evolved to mean 'not subjected to such actions'.