FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

themelios θεμέλιος θεμέλιον — them-el'-ee-os} 或 themelion {them-el'-ee-on — from a derivative of 5087; something put down, i.e. a substruction (of a building, etc.), (literally or figuratively):--foundation.

see GREEK for 5087