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perilous

per·il·ous

perilous

 
 
pronunciation:
pe rih ls
part of speech: adjective
definition: causing or involving great danger; risky; hazardous.
For three days, the ship tossed on perilous seas.
synonyms:
dangerous, hazardous, risky, treacherous
antonyms:
safe
similar words:
chancy, menacing, minatory, ominous, precarious, threatening
derivations: perilously (adv.), perilousness (n.)