In a manner that predicts or anticipates something; done with foresight about what's coming.
From 'forecast' plus the adverbial suffix '-ingly,' which turns verbs and adjectives into adverbs describing how something is done. This is a rare formation combining predictive action with manner of execution.
This adverb is so uncommon you'll rarely hear it spoken aloud, but it captures something beautiful: doing something while thinking ahead about consequences, like a chess master moving 'forecastingly' by planning ten moves ahead.
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