By Gaylon West.


History of English use

"Epi" before vowels reduced to "ep-", before aspirated vowels eph-, word-forming element meaning "on, upon, above," also "in addition to; toward, among," from Greek epi "upon, at, close upon (in space or time), on the occasion of, in addition," from PIE *epi, *opi "near, at, against" (cognates: Sanskrit api "also, besides;" Avestan aipi "also, to, toward;" Armenian ev "also, and;" Latin ob "toward, against, in the way of;" Oscan op, Greek opi- "behind;" Hittite appizzis "younger;" Lithuanian ap- "about, near;" Old Church Slavonic ob "on"). A productive prefix in Greek; also used in modern scientific compounds (such as epicenter).
- http://www.etymonline.com/

epi G1909 - Thayer Definition:
1) upon, on, at, by, before 2) of position, on, at, by, over, against 3) to, over, on, at, across, against
Part of Speech: preposition
A Related Word by Thayer’s/Strong’s Number: a root