'unpasteurized' originates from the prefix 'un-' meaning 'not' and 'pasteurized,' which comes from the name of Louis Pasteur, who developed the pasteurization process.

'pasteurized' changed from the French word 'pasteurisé' and eventually became the modern English word 'pasteurized.'

Initially, it meant 'not subjected to pasteurization,' and this meaning has largely remained the same in modern usage.