Etymology of the Latin word diluvium
the Latin word diluvium (flood, inundation; deluge)
derived from the Latin word diluere (bathe, wet, moisten; rebut, refute, explain away; wash; dissolve and carry away)
using the Latin prefix dis-
derived from the Latin word lavare (to wash; wash, bathe; soak)
derived from the Latin word luere (atone, make amends for, expiate; fulfill , make good; discharge; pay; pay fine, compensate; wash, lave; cleanse)