Synonym: dense, impassable, inaccessible, obscure, unapproachable, unclear, unintelligible, vague. Similar words: penetrate, penetrating, venerable, impeccable, impermeable, imperturbable, unimpeachable, transferable. Meaning: [ɪm'penɪtrəbl] 
adj. 1. not admitting of penetration or passage into or through 2. permitting little if any light to pass through because of denseness of matter 3. impossible to understand.
adj. 1. not admitting of penetration or passage into or through 2. permitting little if any light to pass through because of denseness of matter 3. impossible to understand. 
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31) Somewhere in the impenetrable blackness was a desperate man, cold, hungry, hunted.
32) A rose hedge can become a useful, impenetrable barrier if clipped regularly.
33) For example, the days of dull, impenetrable forms that seemed designed to obscure rather than to convey information are passing.
34) Heavy oak doors open into an impenetrable warren of bleak rooms painted in regulation Ministry of Works cream.
35) Much of it is also written specifically for specialists, being virtually impenetrable to the uninitiated reader.
36) But neglected and uncontrolled the same earth very soon destroys cultivated land and human habitat with impenetrable overgrowth.
37) What she once considered oppressive about Joseph, his cold style and impenetrable attitude,(http://sentencedict.com/impenetrable.html) now earned her respect.
38) As she rounded the final corner, the trees were in front of her, a dark and impenetrable barrier hiding the house completely.
39) Which was further away from the real but impenetrable humanity of these black men and women?
40) The Krakonosc Mountains are a deep range of steep slopes and dense, all but impenetrable forest.
41) Meticulously painted in blood maroon and bruise brown, the body parts form an impenetrable jungle trapping various objects in their interior.
42) He would make the Britches impenetrable, tackle the dead trees and plant saplings.
43) The only possible candidate for pure night is the outermost ring, which is solid and impenetrable.
44) The two approaches, therefore, are not hermetically sealed units[Sentencedict.com], impenetrable to each other.
45) There, the themes of depth, impenetrable darkness, water, abandonment, corruption and death are all present at once.
46) Granted, the casual observer may dismiss this as impenetrable blarney.
47) A decade ago this was Checkpoint Charlie, one of the few gaps in an otherwise impenetrable barrier a hundred miles long.
48) Yet some people seem to learn to live with imperfection and others find it an impenetrable barrier.
49) The result is becoming too impenetrable to be viewed as anything but a plot against the public.
50) Out of the mouth of this serious, pretty girl came an impenetrable, sub-literate provincial dialect.
51) It is at this point that the anthropologist, when pressed, retreats into impenetrable jungles of ethnographic fact.
52) But the reserve through which that attractive generosity and warmth powerfully shone was, for him, an impenetrable and necessary protection.
53) She wrote poetry with impenetrable syntax about a life where nothing ever happened.
54) Racism is the product of impenetrable or hermetically sealed minds.
55) The Greystones garden was like a jungle, parts of it as impenetrable as the Britches.
56) He is impenetrable to reason.
57) The motive for the crime was impenetrable.
58) Their feathers were like armor impenetrable to steel.
59) Armor plate is impenetrable by ordinary bullets.
60) Moreover, matter is also impenetrable.
More similar words: penetrate, penetrating, venerable, impeccable, impermeable, imperturbable, unimpeachable, transferable, impending, impenitent, arable, parable, honorable, wearable, bearable, adorable, incurable, admirable, tolerable, separable, comparable, endurable, memorable, favourable, favorable, desirable, execrable, miserable, imperceptible, vulnerable.