calamity
Concise Oxford English Dictionary © 2008 Oxford University Press:
calamity/kəˈlaməti/
▶noun (pl. calamities) an event causing great and often sudden damage or distress.
– derivatives
calamitous adjective,
calamitously adverb.
calamitous adjective,
calamitously adverb.
– origin ME: from OFr. calamite, from L. calamitas.
'calamity' also found in these Oxford entries:

