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Meaning of impassible

im•pas•si•ble

Pronunciation: (im-pas'u-bul), [key]
— adj.
  1. incapable of suffering pain.
  2. incapable of suffering harm.
  3. incapable of emotion; impassive.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.