'stimulant' originates from Latin, specifically the word 'stimulans,' where 'stimulare' meant 'to goad or incite.'

'stimulans' transformed into the French word 'stimulant,' and eventually became the modern English word 'stimulant' through Middle English.

Initially, it meant 'to incite or provoke,' but over time it evolved into its current meaning of 'a substance that increases activity.'