Lexical Definition

‎συγκοινωνέω‎ synkoinōnéō (soong-koy-no-neh'-o) to share with G:V
from ‎σύν‎ and ‎κοινωνέω‎

communicate (have fellowship) with, be partaker of.

Usage: 3 forms in 3 verses
Form Translated As     In Verse(s)
συγκοινωνεῖτε do have fellowship with Eph.5.11
συγκοινωνήσητε you may have fellowship Rev.18.4
συγκοινωνήσαντέσ having fellowship in Phil.4.14

Abbott-Smith

* συν-κοινωνέω (Rec. συγκ-), -ῶ,
to have fellowship with or in (in cl., c. gen. rei, dat. pers.): c. dat. rei, Eph 5:11, Re 18:4; id. c. gen. pers., Phl 4:14.†

Abbott-Smith References

Book Refs
Ephesians 5:11
Philippians 4:14
Revelation 18:4

Liddell-Scott-Jones

συγκοινωνέω-έω,

have a joint share of, τῆς δόξης ταύτης [Refs 4th c.BC+]; to be connected with, τῆς κνήμης [Refs 5th c.BC+]; σ. τινί τινος go shares with one in a thing, [Refs 2nd c.AD+]

__2 in “NT” with dative, take part in, have fellowship with, ταῖς ἁμαρτίαις [NT]

LSJ Scripture Refs: Rev.18.4Eph.5.11Phil.4.14