5287  hupostasis  hoop-os'-
tas-is

 from a compound of 5259 and 
2476; a setting under 
(support), i.e. 
(figuratively) concretely, 
essence, or abstractly, 
assurance (objectively or 
subjectively):--confidence, 
confident, person, substance.

 see GREEK for 5259

 see GREEK for 2476