This root form (lemma) is used in 2 different forms in the NT: ἐπισυναγωγὴν (AFS), ἐπισυναγωγῆς (GFS).
It is glossed in 1 way: ‘gathering_together’.
OET 2TH 2:1 Greek word=ἐπισυναγωγῆς (episunagōgaʸs) Morphology=GFS English gloss=‘gathering_together’ SR GNT 2TH 2:1 word 15
OET HEB 10:25 Greek word=ἐπισυναγωγὴν (episunagōgaʸn) Morphology=AFS English gloss=‘gathering_together’ SR GNT HEB 10:25 word 6