prognosticate

To predict or forecast, especially through the application of skill.transitive

• Examining the tea-leaves, she prognosticated dark days ahead.
• All old people and many sick people were drawn, were it only for a foot or two, into the open air, and prognosticated pleasant things about the course of the world.

To presage, betoken.transitive

• The bluebells may prognosticate an early spring this year.