The story
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Hellenic*ə-
- Ancient Greekἀ- (a-)
- Englisha-
- Proto-Indo-European*ster-
- Ancient Greekστερεός (stereós)
- Ancient Greekστερεο- (stereo-)
- Englishstereo-
- Proto-Indo-European*ǵneh₃-
- Proto-Indo-European*ǵneh₃tis
- Ancient Greekγνῶσῐς (gnôsĭs)
- Englishgnosis
- Englishstereognosis
- English todayastereognosis
From a- + stereognosis.
Etymology from Wiktionary, CC BY-SA 4.0.