This root form (lemma) is used in 3 different forms in the NT: πρύμνα (NFS), πρύμνης (GFS), πρύμνῃ (DFS).
It is glossed in 2 different ways: ‘the stern’, ‘stern’.
OET MARK 4:38 Greek word=πρύμνῃ (prumnaʸ) Morphology=DFS English gloss=‘stern’ SR GNT MARK 4:38 word 8
OET ACTS 27:29 Greek word=πρύμνης (prumnaʸs) Morphology=GFS English gloss=‘the stern’ SR GNT ACTS 27:29 word 16
OET ACTS 27:41 Greek word=πρύμνα (prumna) Morphology=NFS English gloss=‘stern’ SR GNT ACTS 27:41 word 21