WordWeb Online

1. Make a prediction about; tell in advance
   "prognosticate the outcome of an election";
   - predict, foretell, call, forebode, anticipate, promise
    
2. Be a sign of something to come, esp. something important or bad
   "These signs prognosticate bad news";
   - bode, portend, auspicate, omen, presage, betoken [archaic], foreshadow, augur, foretell, prefigure, forecast, predict, foretoken

Derived forms: prognosticating, prognosticated, prognosticates

Type of: bespeak, betoken [archaic], guess, hazard, indicate, point, pretend, signal, venture

Encyclopedia: Prognosticate