prognostic

From Medieval Latin prognosticus, from Ancient Greek προγνωστικός (prognōstikós, “foreknowing”), from πρό (pró) + γνωστικός (gnōstikós, “of or for knowing, good at knowing”), from γιγνώσκω (gignṓskō, “to learn to know, to perceive, to mark, to learn”).