'gradually' originates from Latin, specifically the word 'gradualis,' where 'gradus' meant 'step.' 'Change' originates from Old French, specifically the word 'changier,' where it meant 'to alter or exchange.'

'Gradualis' transformed into the French word 'graduel,' and eventually became the modern English word 'gradual.' 'Changier' transformed into the Middle English word 'chaungen,' and eventually became the modern English word 'change.'

Initially, 'gradual' meant 'by steps,' and 'change' meant 'to alter or exchange.' Over time, 'gradually change' evolved to mean 'to undergo a slow and steady transformation.'