'improvisational' originates from the Latin word 'improvisus,' where 'in-' meant 'not' and 'provisus' meant 'foreseen.'

'improvisus' transformed into the French word 'improvisation,' and eventually became the modern English word 'improvisational.'

Initially, it meant 'not foreseen or planned,' but over time it evolved into its current meaning of 'characterized by improvisation.'