Episteme
"Episteme" is a philosophical term derived from the Ancient Greek word ἐπιστήμη "epistēmē", which can refer to knowledge, science or understanding, and which comes from the verb , meaning "to know, to understand, or to be acquainted with".
Ephectics
Ephectic comes from the Ancient Greek ἐφεκτικός ("ephektikos"), which itself dervives from the verb ἐπέχειν ("epechein"), meaning to hold back.