'decisiveness' originates from the Latin word 'decidere,' where 'de-' meant 'off' and 'caedere' meant 'to cut.'

'decidere' transformed into the French word 'décider,' and eventually became the modern English word 'decide,' from which 'decisiveness' is derived.

Initially, it meant 'to cut off or determine,' but over time it evolved into its current meaning of 'the ability to make decisions quickly and effectively.'