prognostication (n.)

"foretelling or foreshadowing of future events by present signs," especially "act of making a medical prognosis," late 14c., pronasticacioun, from Old French pronosticacion (14c.) and directly from Medieval Latin *prognosticationem (nominative prognosticatio), noun of action from past-participle stem of prognosticare "foretell," from Latin prognostica "sign to forecast weather," from neuter plural of Greek prognōstikos "foreknowing," from progignōskein "come to know beforehand" (see prognosis). The -g- was restored in the English word 16c.