ἐπί
epí · word · “on, upon, over”
Epi means on, upon, over. The Spirit comes "upon (epi)" believers at Pentecost; Jesus prays "Let this cup pass — yet upon your will."
Epi is a flexible preposition for location, foundation, and authority — what rests on, builds upon, has charge over.
In Luke-Acts the Spirit comes epi the disciples; in Matthew the church is built epi the rock; in Romans God is "over all," epi pantōn.
Definition: properly, meaning superimposition (of time, place, order, etc.), as a relation of distribution (with the genitive case), i.e. over, upon, etc.; of rest (with the dative case) at, on, etc.; of direction (with the accusative case) towards, upon, etc.
KJV usage: about (the times), above, after, against, among, as long as (touching), at, beside, X have charge of, (be-, (where-))fore, in (a place, as much as, the time of, -to), (because) of, (up-)on (behalf of), over, (by, for) the space of, through(-out), (un-)to(-ward), with
Reference gloss from Strong's Concordance (1890, public domain).
Original BibleDawn word study. Original-language data and the public-domain Strong's (1890) gloss are referenced; see sources.