Jun 22, 2026 · The meaning of IMPENETRABLE is incapable of being penetrated or pierced. How to use impenetrable in a sentence.

IMPENETRABLE definition: 1. impossible to see through or go through: 2. impossible to understand: 3. impossible to see…. Learn more.

3 days ago · Synonyms for IMPENETRABLE: dense, impervious, close, impregnable, impassable, impermeable, thick, frozen; Antonyms of IMPENETRABLE: permeable, soft, negotiable, passable, …

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. Impenetrable comes from the Latin …

Learn what impenetrable means with clear definitions, pronunciation, synonyms, and real-world examples. Simple explanations to help you use impenetrable correctly.

IMPENETRABLE meaning: 1. impossible to see through or go through: 2. impossible to understand: 3. impossible to see…. Learn more.

1. Impossible to penetrate or enter: an impenetrable fortress. 2. Impossible to understand; incomprehensible: impenetrable jargon. 3. Impervious to sentiment or argument: an impenetrable heart.

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.

If you describe something such as a book or a theory as impenetrable, you are emphasizing that it is impossible or very difficult to understand.

Definition of impenetrable adjective in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.