per·il·ous

[per-uh-luhs]
adjective
involving or full of grave risk or peril; hazardous; dangerous: a perilous voyage across the Atlantic in a small boat.

Origin:
1250–1300; Middle English < Anglo-French perillous < Latin perīculōsus. See peril, -ous

per·il·ous·ly, adverb
per·il·ous·ness, noun
non·per·il·ous, adjective
non·per·il·ous·ly, adverb
un·per·il·ous, adjective
un·per·il·ous·ly, adverb


risky.


safe.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To perilous
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World English Dictionary
perilous (ˈpɛrɪləs) [Click for IPA pronunciation guide]
 
adj
very hazardous or dangerous: a perilous journey
 
'perilously
 
adv
 
'perilousness
 
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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00:10
Perilous is a GRE word you need to know.
So is predominate. Does it mean:
Acuteness or discernment.
To be chief in importance, quantity, or degree.
Etymonline
Word Origin & History

perilous
late 13c., from O.Fr. perillous (Fr. périlleux) "dangerous, hazardous," from L. periculosus, from periculum "dangerous" (see peril).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Her perilous dash from sandy nest to open sea is the first of many dangerous
  journeys she makes.
The floor is scummy and perilous to walk on.
The center is at the peak of its influence, a perilous place to be.
Since it's heeled onto one side, they'll have to learn how to walk on walls and
  scale the sloping, perilous decks.
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