'agonizer' originates from the Greek word 'agōnizesthai,' where 'agōn' meant 'contest' or 'struggle.'

'agōnizesthai' transformed into the Latin word 'agonizare,' and eventually became the modern English word 'agonize,' from which 'agonizer' is derived.

Initially, it meant 'to compete or struggle,' but over time it evolved into its current meaning of 'to suffer intense pain or distress.'