Synonyms of impenetrable
33 similar words · 20 opposite words
Another word for impenetrable is impregnable. Other synonyms of impenetrable are impermeable, unfathomable, abstruse, Chinese and dense. The opposite of impenetrable is permeable.
Synonyms and similar words for impenetrable
adjectiveNot penetrable.
- impermeable
- impregnableOf a fortress or other fortified place: able to withstand all attacks; impenetrable, inconquerable, unvanquishable.
adjectiveIncomprehensible; fathomless; inscrutable.
- unfathomableImpossible to grasp the extent of, or to fully know or understand.
- abstruseDifficult to comprehend or understand; obscure.
- Chinese
- denseObscure or difficult to understand.
- enigmatic
- fathomless
- bottomless
- Greek
- inapprehensibleThat cannot be apprehended; not apprehensible to or graspable by either body or mind.
- incognizableNot cognizable; incapable of being recognised.
- incomprehensible
- ineffable
- inenubilable formal, literaryInexplicable, mysterious, unclear.
- inexplicableImpossible to explain; not easily accounted for.
- insensibleUnable to be understood; unintelligible.
- inscrutableDifficult or impossible to comprehend, fathom, or interpret.
- insolubleThat cannot be explained.
- insolvable
- mysteriousDifficult to understand.
- nonunderstandableNot understandable.
- obscureDifficult to understand; abstruse.
- tenebrose figurativelyObscure; obtuse; incomprehensible.
- thickDifficult to understand, or poorly articulated.
- undecipherableNot easily deciphered; difficult to read.
- undiscoverable
- unexplainableThat doesn't have a known or readily available explanation.
- ungraspable
- unintelligibleNot intelligible; unable to be understood.
- unknowableNot knowable; not able to be known.
- ununderstandableNot understandable; that cannot be understood.
- retruse obsolete
Opposite of impenetrable
adjectiveNot penetrable.
- penetrable
- permeableAllowing the passage of persons, information, or other things, especially when such passage occurs despite hopes or...
- pregnableVulnerable to attack.
adjectiveIncomprehensible; fathomless; inscrutable.
- fathomableAble to be fathomed.
- apprehensibleWhich can be apprehended (usually in the sense of being understood).
- clearFree of ambiguity or doubt; easily understood.
- limpidClear, transparent or bright.
- comprehensibleAble to be comprehended.
- explainableAble to be explained or understood.
- explicableAble to be explained.
- explicatableExplicable.
- graspable
- illuminable
- intelligibleCapable of being understood; clear to the mind.
- lucid
- pellucidEasily understood; clear.
- perspicuousClearly expressed, easy to understand; lucid.
- straightforward
- tangible
- understandable
Meaning of impenetrable
- adjective Not penetrable.
- adjective Opaque; obscure; not translucent or transparent.
- adjective Incomprehensible; fathomless; inscrutable.
impenetrable in other languages
Questions about synonyms of impenetrable
- What is another word for impenetrable?
- Impenetrable has 33 synonyms on Word.ws, such as impregnable, impermeable, unfathomable, abstruse, Chinese, dense, enigmatic and fathomless.
- What is the opposite of impenetrable?
- The opposite of impenetrable is permeable.
- What does impenetrable mean?
- Impenetrable means not penetrable.
Source and license
Adapted from Wiktionary: impenetrable (page history and authors) and the entries of the words listed. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws grouped the synonyms and antonyms by meaning and added links. Wiktionary data of 2026-09-02.
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Cite this page: “Synonyms of impenetrable.” Word.ws, https://word.ws/synonyms/impenetrable. Based on Wiktionary, CC BY-SA 4.0.