impenetrable

listen to the pronunciation of impenetrable
Английский Язык - Английский Язык
not penetrable

The fortress is impenetrable, so it cannot be taken.

incomprehensible; inscrutable

Business jargon makes this document impenetrable, I can't understand it.

unimpressible; not to be moved by arguments or motives; as, an impenetrable mind, or heart
impossible to understand; "impenetrable jargon"
impossible to understand; "impenetrable jargon" not admitting of penetration or passage into or through; "an impenetrable fortress"; "impenetrable rain forests
Incapable of being penetrated or pierced; not admitting the passage of other bodies; not to be entered; impervious; as, an impenetrable shield
not admitting of penetration or passage into or through; "an impenetrable fortress"; "impenetrable rain forests
Inaccessible, as to knowledge, reason, sympathy, etc
permitting little if any light to pass through because of denseness of matter; "dense smoke"; "heavy fog"; "impenetrable gloom"
If you describe something such as a barrier or a forest as impenetrable, you mean that it is impossible or very difficult to get through. the Caucasus range, an almost impenetrable barrier between Europe and Asia
{s} incapable of being penetrated or entered; unsusceptible to outside ideas or influences; unfathomable, inscrutable
not admitting of penetration or passage into or through; "an impenetrable fortress"; "impenetrable rain forests"
emphasis 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. His books are notoriously impenetrable. = incomprehensible + impenetrably im·pen·etrably impenetrably detailed reports on product sales. = incomprehensibly
Having the property of preventing any other substance from occupying the same space at the same time
impervious
unpenetrable
impenetrable darkness
total darkness
impenetrably
In an impenetrable manner or state; imperviously
ımpenetrable
{a} not to be pierced or found out
impenetrability
incomprehensibility by virtue of being too dense to understand resistance to penetration by a liquid
impenetrability
Insusceptibility of intellectual or emotional impression; obtuseness; stupidity; coldness
impenetrability
The characteristic of being impenetrable; invulnerability
impenetrability
That property in virtue of which two portions of matter can not at the same time occupy the same portion of space
impenetrability
resistance to penetration by a liquid
impenetrability
Quality of being impenetrable
impenetrability
incomprehensibility by virtue of being too dense to understand
impenetrability
{i} incapability of being penetrated or entered; insusceptibility to outside ideas or influences; unfathomability, inscrutability
impenetrably
in an impenetrable manner, impassably, impermeably
impenetrable
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