'whim' originates from English, specifically as a shortening of the earlier word 'whim-wham', where 'whim-wham' meant 'a fanciful object or notion.'

'whim' changed from the earlier English expression 'whim-wham' (recorded in the early 17th century) and eventually became the modern English word 'whim' by mid-17th century.

Initially, it meant 'a fanciful object or notion', but over time it evolved into its current meaning of 'a sudden capricious idea or desire.'