G1476–ἑδραῖος–hedraios

And he who hath stood stedfast in the heart -- not having necessity -- and hath authority over his own will, and this he hath determined in his heart -- to keep his own virgin -- doth well;

ἑδραῖος hedraios “firm”

so that, my brethren beloved, become ye stedfast, unmovable, abounding in the work of the Lord at all times, knowing that your labour is not vain in the Lord.

ἑδραῖοι hedraioi “steadfast”

if also ye remain in the faith, being founded and settled, and not moved away from the hope of the good news, which ye heard, which was preached in all the creation that `is' under the heaven, of which I became -- I Paul -- a ministrant.

ἑδραῖοι hedraioi “firm”