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Meaning of impenetrability

im•pen•e•tra•bil•i•ty

Pronunciation: (im-pen"i-tru-bil'i-tē, im"pen-), [key]
— n.
  1. the state or quality of being impenetrable.
  2. that property of matter by virtue of which two bodies cannot occupy the same space simultaneously.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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