Thesaurus
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
- impassable
- (also impassible),
- impermeable,
- impervious,
- impregnable
Words Related to impenetrable
Near Antonyms for impenetrable
Antonyms for impenetrable
2
being beyond one's powers to know, understand, or explain
- the mysteries of that religion are completely impenetrable to outsiders
Synonyms for impenetrable
- arcane,
- cryptic,
- deep,
- enigmatic
- (also enigmatical),
- inscrutable,
- mysterious,
- mystic,
- occult,
- uncanny
Words Related to impenetrable
Near Antonyms for impenetrable
3
impossible to understand
- the textbook's language is completely impenetrable, at least to me
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
- airtight,
- hermetic
- (also hermetical),
- leakproof,
- watertight
Near Antonyms for impenetrable
Antonyms for impenetrable
Keep scrolling for more
Learn More About impenetrable
Cite this Entry
“Impenetrable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impenetrable. Accessed 27 Sep. 2021.
Style: MLA
MLA
Chicago
APA
Merriam-Webster
Chicago
APA
Merriam-Webster
Test Your Vocabulary
Difficult Spelling Words Quiz
-
- Which is the correct spelling?
Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Share impenetrable
Time Traveler for impenetrable
The first known use of impenetrable was in the 15th century
See more words from the same century