'interval' originates from Latin, specifically the word 'intervallum,' where 'inter-' meant 'between' and 'vallum' meant 'rampart or wall.'

'intervallum' transformed into the Old French word 'intervalle,' and eventually became the modern English word 'interval' through Middle English.

Initially, it meant 'a space between walls or ramparts,' but over time it evolved into its current meaning of 'a period of time or space between events or objects.'