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".
Epoché
Epoché (ἐποχή "epokhē", "suspension") is an ancient Greek term typically translated as "suspension of judgment" but also as "withholding of assent". In its philosophical usage "epoché" describes the state where all judgments about non-evident matters are suspended in order to induce a state of ataraxia (freedom from worry and anxiety). This concept was developed by the Pyrrhonist school of philosophy and was also employed in Academic Skepticism.