Calamitous/kəˈlæmɪtəs/ Definition 1 of 1Pro Tip 1/3Severity Scale Use 'calamitous' for extremely negative situations, more serious than 'bad' or 'unfortunate.' The war had calamitous effects on the region. Pro Tip 2/3Not Personal 'Calamitous' is typically used for large-scale disasters, not personal mishaps. The earthquake was a calamitous natural disaster. Pro Tip 3/3Emotional Weight Using 'calamitous' can evoke strong emotional reactions due to its association with tragedy. News of the calamitous hurricane spread rapidly.