θεμέλιος, -ον (τίθημι), [in LXX for אַרְמוֹן, מוֹסָד, etc;]
of or for a foundation; as subst, ὁ θ. (sc. λίθος),
a foundation stone, foundation: Luk.6:48-49 14:29 (but see Deiss, BS, 123); pl, οἰ θ. (cl.), Heb.11:10 Rev.21:14, 19; neut, τὸ θ. (Arist, Phys, vi, 6, 10, LXX and later writers), Act.16:26; metaphorically, Rom.15:20, 1Co.3:10-12 Eph.2:20, 1Ti.6:19, 2Ti.2:19, Heb.6:1. (
AS)