portend
Definitions
To be a sign or warning that something, especially something momentous or calamitous, is likely to happen.
To serve as an omen or predictive indication of a future event.
Examples
The dark clouds gathering on the horizon portend a severe storm later this evening.
Many economists believe that the sudden drop in stock prices may portend a looming recession.
The strange silence in the forest seemed to portend some kind of impending danger.