Epi is defined as upon, over, around or besides.
(prefix)An example of epi used as a prefix is in the word epicenter.
See epi- in Webster's New World College Dictionary
Origin: < Gr epi, at, on, to, upon, over, besides < IE base *epi > Sans ápi, L ob
See epi- in American Heritage Dictionary 4
or ep-
prefixOrigin:
Origin: Greek
Origin: , from epi, upon; see epi in Indo-European roots
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