Strong's G4973 — σφραγίς (noun)
sphragis (sfrag-ece') n.
1. a signet (as fencing in or protecting from misappropriation)
2. (by implication) the stamp impressed (as a mark of privacy, or genuineness)
{literally or figuratively}
[probably strengthened from G5420]
KJV: seal 
Root(s): G5420 
Hebrew root: φράσσω
Occurrences: 16