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perilous

[per-uh-luh s] /ˈpɛr ə ləs/
adjective
1.
involving or full of grave risk or peril; hazardous; dangerous:
a perilous voyage across the Atlantic in a small boat.
Origin of perilous
1250-1300
1250-1300; Middle English < Anglo-French perillous < Latin perīculōsus. See peril, -ous
Related forms
perilously, adverb
perilousness, noun
nonperilous, adjective
nonperilously, adverb
unperilous, adjective
unperilously, adverb
Synonyms
risky.
Antonyms
safe.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for perilous

perilous

/ˈpɛrɪləs/
adjective
1.
very hazardous or dangerous: a perilous journey
Derived Forms
perilously, adverb
perilousness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for perilous
adj.

c.1300, from Old French perillos "perilous, dangerous" (Modern French périlleux) "dangerous, hazardous," from Latin periculosus "dangerous, hazardous," from periculum "a danger, attempt, risk" (see peril). Related: Perilously; perilousness.

Online Etymology Dictionary, © 2010 Douglas Harper
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