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Impenetrable vs Bulletproof - What's the difference?

impenetrable | bulletproof |

As adjectives the difference between impenetrable and bulletproof

is that impenetrable is not penetrable while bulletproof is capable of withstanding a direct shot by a bullet fired from a gun.

As a verb bulletproof is

to make proof against bullets.

impenetrable

English

Adjective

(-)
  • Not penetrable.
    • The fortress is impenetrable , so it cannot be taken.
  • * '>citation
    • The avalanche spread and stopped, locking everything it carried into an icy cocoon. It was now a jagged, virtually impenetrable pile of ice, longer than a football field and nearly as wide.
  • (figuratively) ; inscrutable.
    • Business jargon makes this document impenetrable , I can't understand it.

    Antonyms

    * penetrable

    bulletproof

    English

    Alternative forms

    * bullet-proof

    Adjective

    (en adjective)
  • (of a material) Capable of withstanding a direct shot by a bullet fired from a gun.
    • A bulletproof window.
    A bulletproof vest.
  • (idiomatic) reliable, infallible, sturdy or error-tolerant.
  • (usually, of an idea or concept) Unbreakable, very tough.

    • Synonyms

    * (infallible) foolproof

    Verb

    (en verb)
  • To make proof against bullets.
  • (slang) to make resistant to failure.
    • We have to bulletproof this program before we let the users at it; check every input, catch every possible flaw...it must not fail in use.