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disastrous

[dih-zas-truh s, -zah-struh s] /dɪˈzæs trəs, -ˈzɑ strəs/
adjective
1.
causing great distress or injury; ruinous; very unfortunate; calamitous:
The rain and cold proved disastrous to his health.
2.
Archaic. foreboding disaster.
Origin
1580-1590
1580-90; < Middle French desastreux, Italian disastroso. See disaster, -ous
Related forms
disastrously, adverb
disastrousness, noun
nondisastrous, adjective
nondisastrously, adverb
nondisastrousness, noun
predisastrous, adjective
predisastrously, adverb
quasi-disastrous, adjective
quasi-disastrously, adverb
undisastrous, adjective
undisastrously, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Word Origin and History for un disastrous
disastrous
1580s, from Fr. désastreux (16c.), from désastre (see disaster).
Online Etymology Dictionary, © 2010 Douglas Harper
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