Thesaurus

impenetrable

adjective

Synonyms & Antonyms of impenetrable

1 impossible to get through or into
  • the ancient temple was surrounded by vast stretches of impenetrable jungle

Synonyms for impenetrable

Words Related to impenetrable

Near Antonyms for impenetrable

Antonyms for impenetrable

4 not allowing penetration (as by gas, liquid, or light)
  • the container of toxic waste has an impenetrable seal to prevent leaks

Synonyms for impenetrable

Words Related to impenetrable

Near Antonyms for impenetrable

Antonyms for impenetrable

See the Dictionary Definition 

Keep scrolling for more

Learn More About impenetrable

Time Traveler for impenetrable

Time Traveler

The first known use of impenetrable was in the 15th century

See more words from the same century

Thesaurus Entries Near impenetrable

impenetrability

impenetrable

impenitence

See More Nearby Entries 

Cite this Entry

“Impenetrable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impenetrable. Accessed 27 Sep. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on impenetrable

Nglish: Translation of impenetrable for Spanish Speakers

Britannica English: Translation of impenetrable for Arabic Speakers

WORD OF THE DAY

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Love words? Need even more definitions?

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