perilous

adjective

per·​il·​ous ˈper-ə-ləs How to pronounce perilous (audio)
ˈpe-rə-
Synonyms of perilousnext
: full of or involving peril
a perilous journey
perilously adverb
perilousness noun

Synonyms

See all Synonyms & Antonyms in Thesaurus 
Choose the Right Synonym for perilous

dangerous, hazardous, precarious, perilous, risky mean bringing or involving the chance of loss or injury.

dangerous applies to something that may cause harm or loss unless dealt with carefully.

soldiers on a dangerous mission

hazardous implies great and continuous risk of harm or failure.

claims that smoking is hazardous to your health

precarious suggests both insecurity and uncertainty.

earned a precarious living by gambling

perilous strongly implies the immediacy of danger.

perilous mountain roads

risky often applies to a known and accepted danger.

shied away from risky investments

Examples of perilous in a Sentence

a perilous journey across the mountains a perilous journey through hostile territory
Recent Examples on the Web One of the most prominent and challenging tasks in her portfolio was trying to improve the economic, security and political conditions in Honduras, El Salvador and Guatemala to stem the number of migrants making a perilous journey to the United States. —Courtney Subramanian, Los Angeles Times, 7 July 2024 Iran’s conflict with Israel has also reached perilous levels in recent months. —Luba Kassova, Fortune, 6 July 2024 Joe Biden’s ratings are in perilous political territory. —Isaac Chotiner, The New Yorker, 4 July 2024 There’s a widespread feeling among voters that something has gone awry under Tory government, that the country is stagnating, if not in perilous decline. —Samuel Granados, Washington Post, 3 July 2024 See all Example Sentences for perilous 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'perilous.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Middle English perilous, perelous, borrowed from Anglo-French perilleus, perillous, going back to Latin perīculōsus, from perīculum "test, risk, peril entry 1" + -ōsus -ous

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of perilous was in the 14th century

Dictionary Entries Near perilous

perilless

perilous

perilously close to

See More Nearby Entries 

Cite this Entry

“Perilous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/perilous. Accessed 15 Jul. 2024.

Copy Citation

Share

Kids Definition

perilous

adjective
per·​il·​ous ˈper-ə-ləs How to pronounce perilous (audio)
: full of or involving peril
perilously adverb
perilousness noun

More from Merriam-Webster on perilous

Nglish: Translation of perilous for Spanish Speakers

Britannica English: Translation of perilous for Arabic Speakers

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Popular in Grammar & Usage

See All

Plural and Possessive Names: A Guide

Commonly Misspelled Words

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)

Absent Letters That Are Heard Anyway

How to Use Accents and Diacritical Marks
See All

Popular in Wordplay

See All

It's a Scorcher! Words for the Summer Heat

Flower Etymologies For Your Spring Garden

12 Star Wars Words

'Swash', 'Praya', and 12 More Beachy Words

8 Words for Lesser-Known Musical Instruments
See All

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Word Game Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
Missing Letter A crossword with a twist
winning words from the national spelling bee logo
Spelling Bee Quiz Can you outdo past winners of the National Spelli...