G1476–ἑδραῖος–hedraios

But he who stands steadfast in his heart, having no necessity, but has power over his own heart, to keep his own virgin, does well.

ἑδραῖος hedraios “firm”

Therefore, my beloved brothers, be steadfast, immovable, always abounding in the Lord's work, because you know that your labor is not in vain in the Lord.

ἑδραῖοι hedraioi “steadfast”

if it is so that you continue in the faith, grounded and steadfast, and not moved away from the hope of the Gospel which you heard, which is being proclaimed in all creation under heaven; of which I, Paul, was made a servant.

ἑδραῖοι hedraioi “firm”