'unutilized' originates from the prefix 'un-' meaning 'not' and the verb 'utilize,' which comes from Latin 'utilis' meaning 'useful.'

'utilis' transformed into the French word 'utiliser,' and eventually became the modern English word 'utilize,' with 'un-' added to form 'unutilized.'

Initially, 'utilize' meant 'to make use of,' and 'unutilized' has consistently meant 'not used.'