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impenetrable

 - 2 dictionary results

im⋅pen⋅e⋅tra⋅ble

  [im-pen-i-truh-buhl]
Use impenetrable in a Sentence
–adjective
1. not penetrable; that cannot be penetrated, pierced, entered, etc.
2. inaccessible to ideas, influences, etc.
3. incapable of being understood; inscrutable; unfathomable: an impenetrable mystery.
4. Physics. possessing impenetrability.
Origin:
1425–75; late ME impenetrabel < L impenetrābilis. See im- 2 , penetrable

Related forms:
im⋅pen⋅e⋅tra⋅ble⋅ness, noun
im⋅pen⋅e⋅tra⋅bly, adverb

Synonyms:
3. incomprehensible, mysterious, obscure, hidden.

Antonyms:
3. clear, lucid.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To impenetrable
im·pen·e·tra·ble   (ĭm-pěn'ĭ-trə-bəl)   
adj.  

  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.

im·pen'e·tra·ble·ness n., im·pen'e·tra·bly adv.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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