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.【近义词】- disaster 普通用词，指大破坏，灾难- misfortune 普通用词，外在因素导致的不幸- calamity 个人的不幸，更严重- catastrophe 语气最强