1) Outside, the fog was thick and impenetrable.

2) They found the jungle virtually impenetrable.

3) I find his style somewhat impenetrable.

4) The fortifications of the castle were massive and impenetrable.

5) The trees formed a dark and impenetrable barrier .

6) Either side of the river is dense, impenetrable jungle.

7) Their jargon is impenetrable to an outsider.

8) This history book is completely impenetrable to me.

9) Her expression was impenetrable.

10) The language of this document would be impenetrable to anyone except a specialist.

11) Valerie's views on Gerald were impenetrable.

12) Their bushes form an impenetrable hedge.

13) His books are notoriously impenetrable.

14) An impenetrable fog halted traffic.

15) Just a short time ago the forest was impenetrable ... and safe.

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17) They stared silently at the impenetrable curtain surrounding the ship, and each face was tense with anxiety.

18) Feminist organizations and the media appeared almost impenetrable to us.

19) But this normally impenetrable barrier is easily breached by fat-soluble ethanol molecules, which slip through like little ghosts.

20) The Japanese market used to be more or less impenetrable.

21) Some of the lyrics on their latest album are completely impenetrable.

22) But they come to realise that they are imprisoned by a transparent but impenetrable wall, which can never be crossed.

23) It's my fault because my notes were so damn impenetrable!

24) For the past half-hour she had been feeling distinctly uneasy as the ever-present shadows had deepened into almost impenetrable blackness.

25) The fire filled the room with a tawny, saffron light and poured pools of impenetrable shadow in the far corners.

26) We followed their tracks down into the swamp where a recent clearcut had left impenetrable thickets of young fir.

27) I accepted to review this book because for me integration has always been a somewhat impenetrable part of quantitative chromatographic analysis.

28) That was until Norman Tebbit spotted what he believed was the biggest chance of holing the impenetrable protective layer around the bill.

29) The gnarled tree trunks-white mulberry and rich brown acacia-formed a perilous and nearly impenetrable net.

30) Work-inhibited children have erected emotional barriers to education and, in response to demands by adults, these barriers become more impenetrable.

1) Outside, the fog was thick and impenetrable.

2) They found the jungle virtually impenetrable.

3) I find his style somewhat impenetrable.

4) The Japanese market used to be more or less impenetrable.

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:///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, 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.

61) She was imperturbable, inscrutable, impenetrable.

62) The Fourth Dimension of Time is a stable construct, though it is not impenetrable.

63) Gamelin made the mistake of viewing the Ardennes as impenetrable and chose to defend it with ten of his weakest, least well equipped and least well trained divisions.

64) And it's not really software, but it should be: the impenetrable techie trick of running a home server.

65) Soon he was within arm's length of the girl, but the way was blocked by an enormous prole and an almost equally enormous woman, presumably his wife, who seemed to form an impenetrable wall of flesh.

66) When it came to drawing joint conclusions, there was a nearly impenetrable opacity about Heath 's formulations.

67) While the World Cup in South Africa is manna from heaven for soccer fans, spare a thought for those who regard "the beautiful game" as a confusing sport with complicated rules and impenetrable jargon.

68) Brambles and multiflora rose grew in impenetrable thickets she detoured around.

69) Mrs. Touchett , for reasons which she seemed excellent, always retired on such occasions into impenetrable seclusion.

70) As a result StrongPoint provides impenetrable authentication using Uniloc's Physical Device Recognition (PDR) technology to grant access to authorized systems and communications networks.

71) Had she the Horadric Malus, she could make the steel sing and craft you a suit of armor as impenetrable as the Great Eye.

72) Alert to human visitors, a young mountain gorilla and its mother sit tight in Bwindi Impenetrable Park.

73) Jonathan Cott, the editor of a recent collection of Bob Dylan interviews, said the motives of the gravel-voiced bard were frequently impenetrable.

74) His dapper self - confidence seemed impenetrable to such hints.

75) She raised between them a barrier impenetrable as a wall.

76) The hand of a mountain gorilla pokes from the rain forest in Bwindi Impenetrable National Park in Uganda.

77) The property market that has since developed, an almost impenetrable blend of government and tycoons, could satisfy no free-market purist.

78) Still, I had also judged the jungle of both banks quite impenetrable.

79) Something even more impenetrable than a language barrier is at work.

80) He switched on the floodlights and what impenetrable darkness became suddenly as clear as day.

81) A smallish man with vulturine features framed by thick grey hair opened the door. His impenetrable aquiline gaze rested on mine.

82) And this optimization scheme is applicable for not only the reconstruction of the impenetrable obstacle but also that of the penetrable obstacle.

83) And on the other side of the rise, an endless impenetrable thicket of poison oak and coyote brush hides quail and other members of its guild.

84) Only a snag down the knee of her tights leavens her impenetrable neatness.

85) Simply the most beautiful island in Vietnam, Phu Quoc is liberally sprinkled with picture-perfect white-sand beaches and cloaked in dense, impenetrable jungle.

86) It was a new experience for me to confront an impenetrable wall.

87) Surely the task at hand requires that you reach for the light within which is your impenetrable armour.

88) Within this viewpoint, neo-Nazism has performed the role of all-purpose bogeyman, as a kind of sinister spectre of capitalism haunting both the margins and the impenetrable heart of society.

89) In order to still his never ending hunger for utter destruction, this warmongering beast mounted a hell slinging catapult on top of his impenetrable shell.

90) The words died under the impenetrable insolence of Bertha's smile.

91) What sort of life went on beyond the impenetrable lines of the Red irregulars.

92) To know that what is impenetrable to us really exists ... is at the center of true religiousness .

93) The SSL VPN should be built on a solid platform that is impenetrable to hackers at the Operating System level, the networking protocol level, and the application level.

94) The sun is high above the impenetrable shade of my wood.

95) She was the picture of a serene and exquisite but impenetrable sphinx.