impenetrable

[ im-pen-i-truh-buhl ]
See synonyms for impenetrable on Thesaurus.com
adjective
  1. not penetrable; that cannot be penetrated, pierced, entered, etc.

  2. inaccessible to ideas, influences, etc.

  1. incapable of being understood; inscrutable; unfathomable: an impenetrable mystery.

  2. Physics. possessing impenetrability.

Origin of impenetrable

1
1425–75; late Middle English impenetrabel<Latin impenetrābilis.See im-2, penetrable

Other words for impenetrable

Opposites for impenetrable

Other words from impenetrable

  • im·pen·e·tra·ble·ness, noun
  • im·pen·e·tra·bly, adverb

Words Nearby impenetrable

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use impenetrable in a sentence

British Dictionary definitions for impenetrable

impenetrable

/ (ɪmˈpɛnɪtrəbəl) /


adjective
  1. incapable of being pierced through or penetrated: an impenetrable forest

  2. incapable of being understood; incomprehensible: impenetrable jargon

  1. incapable of being seen through: impenetrable gloom

  2. not susceptible to ideas, influence, etc: impenetrable ignorance

  3. physics (of a body) incapable of occupying the same space as another body

Derived forms of impenetrable

  • impenetrability, noun
  • impenetrableness, noun
  • impenetrably, adverb

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012