ca·lam·i·tous
adjective/kəˈlæmɪtəs/
/kəˈlæmɪtəs/
(formal)- causing great damage to people’s lives, property, etc.
（对人命、财产等）引起灾难的，灾难性的 - The bridge collapsed in the storm, with calamitous results.
那座桥在暴风雨中倒塌，造成灾难性后果。
- The bridge collapsed in the storm, with calamitous results.