This root form (lemma) is used in 2 different forms in the NT: συμβασιλεύσομεν (IFA1··P), συμβασιλεύσωμεν (SAA1··P).
It is glossed in 2 different ways: ‘may reign_with’, ‘we will_be reigning_with him’.
OET 1COR 4:8 Greek word=συμβασιλεύσωμεν (sumbasileusōmen) Morphology=SAA1··P English gloss=‘may reign_with’ SR GNT 1COR 4:8 word 17
OET 2TIM 2:12 Greek word=συμβασιλεύσομεν (sumbasileusomen) Morphology=IFA1··P English gloss=‘we will_be reigning_with him’ SR GNT 2TIM 2:12 word 4