'apparatus' originates from Latin, specifically the word 'apparātus,' where 'ad-' meant 'toward' and 'parare' meant 'prepare.'

'apparātus' transformed into the French word 'appareil,' and eventually became the modern English word 'apparatus' through Middle English.

Initially, it meant 'preparation or equipment,' but over time it evolved into its current meaning of 'equipment or machinery designed for a specific function.'