Strong's #3749: ostrakinos (pronounced os-tra'-kin-os)
from ostrakon ("oyster") (a tile, i.e. terra cotta); earthen-ware, i.e. clayey; by implication, frail:--of earth, earthen.
Thayer's Greek Lexicon:
̓́
ostrakinos
1) earthen, clay
1a) with the added suggestion of frailty
Part of Speech: adjective
Relation: from ostrakon ["oyster" ] (a tile, i.e. terra cotta)
Usage:
This word is used 2 times:
2 Corinthians 4:7: "this treasure in earthen vessels, that the excellency"
2 Timothy 2:20: "also of wood and of earth; and some to"