ru·in·ous

[roo-uh-nuhs]
adjective
1.
bringing or tending to bring ruin; destructive; disastrous: a ruinous war.
2.
fallen into ruin; dilapidated: a ruinous house.
3.
consisting of ruins: a ruinous city from antiquity.

Origin:
1350–1400; Middle English ruynouse < Latin ruīnōsus, equivalent to ruīn(a) ruin + -ōsus -ous

ru·in·ous·ly, adverb
ru·in·ous·ness, noun
non·ru·in·ous, adjective
non·ru·in·ous·ly, adverb
non·ru·in·ous·ness, noun
un·ru·in·ous, adjective
un·ru·in·ous·ly, adverb
un·ru·in·ous·ness, noun


1. calamitous, ravaging, devastating, catastrophic.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To ruinous
00:10
Ruinous is always a great word to know.
So is flibbertigibbet. Does it mean:
a chattering or flighty, light-headed person.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
Collins
World English Dictionary
ruinous (ˈruːɪnəs) [Click for IPA pronunciation guide]
 
adj
causing, tending to cause, or characterized by ruin or destruction: a ruinous course of action
 
'ruinously
 
adv
 
'ruinousness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
We don't need ruinous short-term attempts to reduce the deficit that will
  plunge the economy into a double-dip recession.
But in many poor nations, a sudden influx of oil money has proven ruinous.
Of course, a one off rise in prices would be ruinous because these changes take
  time.
Given that cohort, presidential cowardice doesn't have ruinous effects.
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