impenetrable

Plural: impenetrables

Adjective

• not admitting of penetration or passage into or through
  • "an impenetrable fortress"
  • "impenetrable rain forests"

Adjective Satellite

• permitting little if any light to pass through because of denseness of matter
  • "impenetrable gloom"
• impossible to understand
  • "impenetrable jargon"

Adj

• Not penetrable.
• Opaque; obscure; not translucent or transparent.
• Incomprehensible; fathomless; inscrutable.

Noun

• A person not openly given to friendship.

Examples

• Business jargon makes this document impenetrable—I can’t understand it.
• The fortress is impenetrable, so it cannot be taken.

Synonyms

dense, heavy, Chinese, Greek, abstruse, enigmatic, fathomless, impenetrable, impermeable, impregnable, inapprehensible, incognizable, incomprehensible, ineffable, inenubilable, inexplicable, inscrutable, insensible, insoluble, insolvable, mysterious, nonunderstandable, obscure, retruse, thick, undecipherable, undiscoverable, unexplainable, unfathomable, ungraspable, unintelligible, unknowable, ununderstandable

Antonyms

penetrable, confusing, fathomable, incomprehensible, permeable, pregnable

Anagrams of impenetrable