impermeable

1. Preventing especially liquids to pass or diffuse through (synset 301777154)
   "impermeable stone"; "an impermeable layer of scum"; "a coat impermeable to rain"
   also:

   • tight - of such close construction as to be impermeable
   • imperviable, impervious - not admitting of passage or capable of being affected
   similar to:

   • retentive - having the power, capacity, or quality of retaining water
   • water-repellent, water-resistant - hindering the penetration of water

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