'subside' originates from Latin, specifically the word 'subsidere,' where 'sub-' meant 'under' and 'sidere' meant 'to sit or settle.'

'subsidere' transformed into the French word 'subsidier,' and eventually became the modern English word 'subside' through Middle English.

Initially, it meant 'to settle or sink down,' but over time it evolved into its current meaning of 'to become less intense or severe.'