The story
- Proto-Indo-European*dwóh₁
- Proto-Indo-European*trísinflu.
- Proto-Indo-European*dwís
- Ancient Greekδιά (diá)
- Ancient Greekδια- (dia-)
- Proto-Indo-European*ǵneh₃-
- Proto-Indo-European*ǵn̥h₃sḱéti
- Proto-Hellenic*gignṓskō
- Ancient Greekγῐγνώσκω (gĭgnṓskō)
- Ancient Greekδῐαγῐγνώσκω (dĭagĭgnṓskō)
- Ancient Greekδῐᾰ́γνωσῐς (dĭắgnōsĭs)
- Ancient Greekδῐᾰ- (dĭă-)
- Proto-Indo-European*ǵneh₃-
- Proto-Indo-European*ǵneh₃tis
- Ancient Greekγνῶσις (gnôsis)
- Ancient Greekγνωστῐκός (gnōstĭkós)
- Ancient Greekδῐαγνωστῐκός (dĭagnōstĭkós)
- English todaydiagnostic
From Ancient Greek διαγνωστικός (diagnōstikós), adjective from διαγιγνώσκω (diagignṓskō, “to distinguish, diagnose”).
Etymology from Wiktionary, CC BY-SA 4.0.