'intolerant' originates from Latin, specifically the word 'intolerans,' where 'in-' meant 'not' and 'tolerare' meant 'to bear or endure.'

'intolerans' transformed into the Old French word 'intolerant,' and eventually became the modern English word 'intolerant' through Middle English.

Initially, it meant 'unable to endure,' but over time it evolved into its current meaning of 'unwilling to accept differing views or conditions.'