'doomsayer' originates from Middle English, specifically the word 'domesman,' where 'dom' meant 'judgment' and 'man' referred to a person.

'domesman' transformed into the modern English word 'doomsayer' through the addition of 'say' to indicate one who speaks or predicts.

Initially, it meant 'a judge or arbiter,' but over time it evolved into its current meaning of 'a person who predicts disaster or misfortune.'