1. causing or involving great damage, suffering, or distress; disastrous

Examples

• The earthquake had calamitous effects on the entire region.
• His calamitous decision to invest all his savings in one stock left him bankrupt.
• The drought proved calamitous for local farmers.
• The company’s calamitous financial losses forced it to close several stores.
• The hurricane’s calamitous winds destroyed hundreds of homes.
• Her calamitous mistake during the presentation cost her the promotion.