'exhaustively' originates from the Latin word 'exhaurire,' where 'ex-' meant 'out' and 'haurire' meant 'to draw or drain.'

'exhaurire' transformed into the French word 'exhaustif,' and eventually became the modern English word 'exhaustive' through Middle English.

Initially, it meant 'to draw out completely,' but over time it evolved into its current meaning of 'thorough and comprehensive.'