The Collaborative International Dictionary
Clysmic
Clysmic \Clys"mic\, a. Washing; cleansing.
Wiktionary
clysmic
a. washing; cleanse
Usage examples of "clysmic".
The continents and seas have suffered many cata clysmic changes, not the least of these being the gradual dissolution of ancient Gondwanaland and the equally gradual re-solution of this mightiest of all land masses.