γνῶσις
gnôsis
“knowledge”
6 words in English grow from this root.
Agnosia
Mindἀ-a-
“not knowing”
Anosognosia
Mindἀ-a-
“no knowledge of the illness”
Diagnosis
Medicineδιάdiá
“knowing thoroughly”
Gnosticism
Faithγνῶσιςgnôsis
“the way of knowing”
Prognosis
Medicineπρόpró
“foreknowledge”
Prosopagnosia
Mindπρόσωπονprósōpon
“no knowledge of faces”