Strong's G2670 — καταποντίζω (verb)
katapontizo (kat-ap-on-tid'-zo) v.
1. to plunge down, i.e. submerge
[from G2596 and a derivative of the same as G4195]
KJV: drown, sink 
Root(s): G2596, G4195 
Hebrew root: Πόντος
Occurrences: 2