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- Dictionaryimpenetrable/ɪmˈpɛnɪtrəbl/
adjective
- 1. impossible to pass through or enter: "a dark, impenetrable forest" Similar Opposite
- 2. impossible to understand: "her expression was impenetrable" Similar Opposite
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adjective. uk / ɪmˈpen.ɪ.trə.b ə l / us / ɪmˈpen.ə.trə.b ə l / Add to word list. impossible to see through or go through: Outside, the fog was thick and impenetrable. an impenetrable barrier. Synonyms. impermeable. impervious (SUBSTANCE) specialized. Compare. waterproof adjective. watertight (NO WATER) weatherproof adjective. Opposite.
impossible to see through or go through: Outside, the fog was thick and impenetrable. an impenetrable barrier. Synonyms. impermeable. impervious (SUBSTANCE) specialized. Compare. waterproof adjective. watertight (NO WATER) weatherproof adjective. Opposite. permeable formal. impossible to understand:
The meaning of IMPENETRABLE is incapable of being penetrated or pierced. How to use impenetrable in a sentence.
adjective. not penetrable; that cannot be penetrated, pierced, entered, etc. inaccessible to ideas, influences, etc. incapable of being understood; inscrutable; unfathomable: an impenetrable mystery. Synonyms: hidden, obscure, mysterious, incomprehensible. Antonyms: lucid, clear. Physics. possessing impenetrability. impenetrable. / ɪmˈpɛnɪtrəbəl /
If you describe something such as a barrier or a forest as impenetrable, you mean that it is impossible or very difficult to get through.
Impenetrable describes something that's impossible to get through. Whether it's a brick wall or a difficult reading passage, something impenetrable won't let you in.
Definition of impenetrable adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.