calamitous

[kuh-lam-i-tuhs]
adjective
causing or involving calamity; disastrous: a calamitous defeat.

Origin:
1535–45; calamit(y) + -ous

calamitously, adverb
calamitousness, noun
uncalamitous, adjective
uncalamitously, adverb


catastrophic, ruinous, devastating.


beneficial, advantageous.
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World English Dictionary
calamitous (kəˈlæmɪtəs)
 
adj
causing, involving, or resulting in a calamity; disastrous
 
ca'lamitously
 
adv
 
ca'lamitousness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

calamitous
1540s, from Fr. calamiteux (16c.), from L. calamitosus "causing loss, destructive," from calamitas (see calamity).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Their decision will trigger cuts in defense spending on a calamitous scale.
If the same thing happened with oil or wheat the results would be calamitous.
To ignore these issues and declare the problem over is a calamitous mistake.
But a calamitous recession and higher unemployment undid this work.
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