'intolerance' originates from Latin, specifically the word 'intolerantia,' where 'in-' meant 'not' and 'tolerantia' meant 'endurance.'

'intolerantia' transformed into the French word 'intolérance,' and eventually became the modern English word 'intolerance' through Middle English.

Initially, it meant 'lack of endurance,' but over time it evolved into its current meaning of 'unwillingness to accept differing views or inability to digest certain substances.'