G3872 παρακαταθήκη (parakatathḗkē)

KJV renderings: that (thing) which is committed (un-)to (trust)
Strong's definition: something put down alongside, i.e. a deposit (sacred trust)
Derivation: from a compound of G3844 (παρά) and G2698 (κατατίθημι);

From James Strong's public-domain dictionaries (G), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.