
1) Airtight 2) Blocked 3) Confusing 4) Dense 5) Enigmatic 6) Hard 7) Inexplicable 8) Inscrutable 9) Mysterious 10) Obscure 11) Opaque 12) Solid 13) Uncomprehensible 14) Unintelligible 15) Unpenetrable 16) Untouchable
Found on
https://www.crosswordclues.com/clue/impenetrable

1) Dense 2) French word used in English 3) Impossible to understand 4) Incapable of being understood 5) Inscrutable 6) Not penetrable 7) Possessing impenetrability 8) Thick
Found on
https://www.crosswordclues.com/clue/impenetrable

• (a.) Having the property of preventing any other substance from occupying the same space at the same time. • (a.) Inaccessible, as to knowledge, reason, sympathy, etc.; unimpressible; not to be moved by arguments or motives; as, an impenetrable mind, or heart. • (a.) Incapable of being penetrated or pierced; not admitting the passa...
Found on
http://thinkexist.com/dictionary/meaning/impenetrable/

1. Incapable of being penetrated or pierced; not admitting the passage of other bodies; not to be entered; impervious; as, an impenetrable shield. 'Highest woods impenetrable To star or sunlight.' (Milton) ... 2. <physics> Having the property of preventing any other substance from occupying the same space at the same time. ... 3. Inaccessible...
Found on
http://www.encyclo.co.uk/local/20973
Im·pen'e·tra·ble adjective [ Latin
impenetrabilis ; prefix
im- not +
penetrabilis penetrable: confer French
impénétrable .]
1. Incapable of being penetrated or pierced; not admitting the passage of other bodies; not to be entered; impervious; as, an
impenetr...Found on
http://www.encyclo.co.uk/webster/I/17

[
adj] - not admitting of penetration or passage into or through 2. [adj] - impossible to understand
Found on
http://www.webdictionary.co.uk/definition.php?query=impenetrable
adjective impossible to understand; `impenetrable jargon`
Found on
https://www.encyclo.co.uk/local/20974

not penetrable; that cannot be penetrated, pierced, entered, etc. · inaccessible to ideas, influences, etc. · incapable of being understood; inscrutable; unfathomable: an impenetrable mystery. · possessing impenetrability.
Found on
https://www.infoplease.com/dictionary/impenetrable
No exact match found.