'monotonize' originates from Greek, specifically the word 'monotonos,' where 'mono-' meant 'single' and 'tonos' meant 'tone.'

'monotonos' transformed into the French word 'monotone,' and eventually became the modern English word 'monotonize' through Middle English.

Initially, it meant 'to make a single tone,' but over time it evolved into its current meaning of 'to make something monotonous or uniform.'