He, she, or it predicts or reveals what will happen in the future; third-person singular present tense of foretell.
From foretell (fore- + tell) in third-person singular present tense with -s suffix. This is the basic verb form describing the action of predicting future events.
The word 'tells' in foretell is clever because it originally meant 'to count' or 'to relate,' so foretelling literally means 'to count/relate beforehand,' which connects our modern idea of predictions to how ancient people tracked patterns in nature.
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