1) to plunge or sink into the sea
1a) to sink, to go down
1b) a grievous offender for the purpose of killing him, to drown
Part of Speech: verb
From G2596 and a derivative of the same as G4195; to plunge down, that is, submerge: - drown, sink.
|cause to sink||15.117|
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root καταποντίζομαι; click on the second column to search for that grammatical form of the root καταποντίζομαι; click on the third column to search for that word and grammatical form; click on the total to search for the root καταποντίζομαι.