'dismissive' originates from the Latin word 'dimittere,' where 'dis-' meant 'apart' and 'mittere' meant 'send.'

'dimittere' transformed into the French word 'dismis,' and eventually became the modern English word 'dismiss' through Middle English.

Initially, it meant 'to send away,' but over time it evolved into its current meaning of 'showing a lack of interest or respect.'