'forecaster' originates from the Old English word 'forecæst,' where 'fore-' meant 'before' and 'cæst' meant 'to throw or project.'

'forecæst' transformed into the Middle English word 'forecasten,' and eventually became the modern English word 'forecast.'

Initially, it meant 'to project or throw forward,' but over time it evolved into its current meaning of 'to predict or estimate future events.'