'herbivorism' originates from the Latin word 'herbivorus,' where 'herba' meant 'grass' and 'vorare' meant 'to devour.'

'herbivorus' transformed into the English word 'herbivore,' and eventually became the modern English word 'herbivorism.'

Initially, it meant 'to devour grass,' but over time it evolved into its current meaning of 'the practice of consuming only plant-based foods.'