'indulge' originates from Latin, specifically the word 'indulgere,' where 'in-' meant 'in' and 'dulcis' meant 'sweet.'

'indulgere' transformed into the Old French word 'endulger,' and eventually became the modern English word 'indulge' through Middle English.

Initially, it meant 'to be kind or tender,' but over time it evolved into its current meaning of 'to allow oneself to enjoy the pleasure of something.'