'infusion' originates from Latin, specifically the word 'infusio,' where 'in-' meant 'into' and 'fundere' meant 'to pour.'

'infusio' transformed into the French word 'infusion,' and eventually became the modern English word 'infusion' through Middle English.

Initially, it meant 'to pour into,' but over time it evolved into its current meanings related to introducing liquids or preparing drinks.