ἑδραίωμα (hedraíōma|hed-rah'-yo-mah|noun|basis)
[Grk] ἑδραίωμα LN: 31.93 GK: G1613
Derivation: from a derivative of ἑδραῖος;
Strong's: a support, i.e. (figuratively) basis
KJV: --ground.
See: ἑδραῖος