ADJ-GRADED 災難性的;引起巨大變化的 A cataclysmic event is one that changes a situation or society very greatly, especially in an unpleasant way. 災難性的;引起巨大變化的 [formal]
...the cataclysmic events that were destroying his faith in humanity.
摧毀他對人性的信念的災難性事件
Few had expected that change to be as cataclysmic as it turned out to be.