'deflector' originates from Latin, specifically the word 'deflectere,' where 'de-' meant 'away' and 'flectere' meant 'to bend.'

'deflectere' transformed into the French word 'défléchir,' and eventually became the modern English word 'deflector' through Middle English.

Initially, it meant 'to bend away,' but over time it evolved into its current meaning of 'a device that changes the direction of something, especially airflow or light.'