calamity
/kəlˈæmətɪ; kə`læmətɪ/ n
serious misfortune or disaster 灾祸; 灾难
The earthquake was the worst calamity in the country's history. 那次地震是全国有史以来最严重的灾难.
(joc 谑) There are worse calamities than failing your driving test. 比起你驾驶考试不合格来说, 更大的灾难还多著呢.