foretokens

Foretokens is the third-person singular verb form of foretoken, meaning to serve as a warning sign or indication of something to come.

A dark sky foretokens a storm; unusual market activity foretokens a crash.

The word carries a somewhat literary or formal tone, appearing more often in written than spoken English.

As a noun, foretokens are signs or omens that presage future events: The economic indicators were foretokens of the recession that followed.