'capsule' originates from Latin, specifically the word 'capsula,' where 'capsa' meant 'box' or 'case.'

'capsula' transformed into the French word 'capsule,' and eventually became the modern English word 'capsule' through Middle English.

Initially, it meant 'a small box or case,' but over time it evolved into its current meaning of 'a small container or a part of a plant or animal that encloses something.'