'gratuity' originates from Latin, specifically the word 'gratuitus,' where 'gratus' meant 'pleasing' or 'thankful.'

'gratuitus' transformed into the French word 'gratuité,' and eventually became the modern English word 'gratuity' through Middle English.

Initially, it meant 'something given freely,' but over time it evolved into its current meaning of 'a tip or reward for services.'