'allopathist' originates from Greek, specifically the word 'allopathos,' where 'allo-' meant 'other' and 'pathos' meant 'suffering.'

'allopathos' transformed into the German word 'allopathisch,' and eventually became the modern English word 'allopathist' through adaptation in medical terminology.

Initially, it meant 'one who treats with remedies producing effects different from the disease,' and this meaning has largely remained the same in modern usage.