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

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

Initially, it meant 'to plan or arrange beforehand,' but over time it evolved into its current meaning of 'predicting future events.'