ἑδραίωμα G1477
hedraíōma · hed-rah'-yo-mah · Noun Neuter
from a derivative of ἑδραῖος; a support, i.e. (figuratively) basis:--ground.
1 Occurrence in the King James Bible
1 Timothy 3:15But if I tarry long, that thou mayest know how thou oughtest to behave thyself in the house of God, which is the church of the living God, the pillar and ground of the truth.