This root form (lemma) is used in 2 different forms in the NT: ἑδραῖοι (NMP), ἑδραῖος (NMS).
It is glossed in 1 way: ‘firm’.
OET 1COR 7:37 Greek word=ἑδραῖος (hedraios) Morphology=NMS English gloss=‘firm’ SR GNT 1COR 7:37 word 9
OET 1COR 15:58 Greek word=ἑδραῖοι (hedraioi) Morphology=NMP English gloss=‘firm’ SR GNT 1COR 15:58 word 6
OET COL 1:23 Greek word=ἑδραῖοι (hedraioi) Morphology=NMP English gloss=‘firm’ SR GNT COL 1:23 word 8