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".
Etymology
In linguistics, the term "etymon" refers to a word or morpheme (e.g., stem or root) from which a later word derives. For example, the Latin word "candidus", which means "white", is the etymon of English "candid".