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

'forecæst' changed from Old English word 'forecæst' 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 or conditions.'