G3749
ὀστράκινος
clay
ὀστράκινος -η, -ον (ὄστρακον, an earthen vessel or potsherd), [in LXX chiefly for חֶרֶשׂ ;] made of clay, earthen: 2Co.4:7, 2Ti.2:20.† (AS)
The KJV translates G3749 in the following manner:
earth (2x), earthen (2x)
Full Thayer's lexicon entry
ὀστράκινος — ostrákinos
ὀστράκινος, ὀστρακινη, ὀστράκινον (ὄστρακον baked clay), made of clay, earthen: σκεύη ὀστράκινα, 2Ti 2:20; with the added suggestion of frailty, 2Co 4:7. (Jer 19:1; Jer 19:11; Jer 39:14; Isa 30:14, etc.; Hippocrates, Anthol. (others).)
2 occurrences
II Corinthians (1), II Timothy (1)