cataclysm1. a sudden violent change in the earth's surface 2. an event resulting in great loss and misfortune【例句】- The eruption of the volcano was an unexpected cataclysm.- The city has just experienced a cataclysmic flood.- Then followed a comparatively long hiatus due to completely understandable causes resulting from the sociopolitical cataclysms.【近義詞】- disaster 普通用詞，指大破壞，災難- misfortune 普通用詞，外在因素導致的不幸- calamity 個人的不幸，更嚴重- catastrophe 語氣最強