1. to predict or forecast (something) based on present signs or evidence
Usage: formal or literary
2. to indicate or suggest (something) as a sign of what will happen in the future
Usage: formal

Examples

• The economist prognosticates that interest rates will rise next quarter.
• Dark clouds prognosticate a storm coming this evening.
• Early sales figures prognosticate strong demand for the new product.
• The doctor prognosticates a full recovery based on the patient's test results.
• Market analysts prognosticate a downturn in the housing sector.
• The ancient oracle prognosticated the fall of the kingdom.
• These warning signs prognosticate trouble ahead for the company.