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".
Eschatology
The word arises from the Greek "eschatos" meaning "last" and "-logy" meaning "the study of", and first appeared in English around 1844. The "Oxford English Dictionary" defines eschatology as "the part of theology concerned with death, judgment, and the final destiny of the soul and of humankind".