Strong's G49 — ἁγνισμός (noun)
hagnismos (hag-nis-mos') n.
1. a cleansing (the act)
2. (ceremonially) to purify by offering (or other method) for appeasement
[from G48]
KJV: purification 
Root(s): G48 
Hebrew root: ἁγνίζω
Occurrences: 1