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   im·per·me·a·ble

   /imˈpərmēəb(ə)l/

   adjective

   • 1. not allowing fluid to pass through: "an impermeable membrane"
   • ▪ not liable to be affected by pain or distress; insusceptible or imperturbable: "women who appear impermeable to pain"

   Word Origin late 17th century: from French imperméable, or from late Latin impermeabilis, from in- ‘not’ + permeabilis (see permeable).

   Derivatives

   • 1. impermeability noun

   Scrabble Points: 19

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   • M

     3

   • P

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   • M

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   • E

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   • A

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   • L

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